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rby_mechanics_guide.html
[title]
RBY Mechanics Guide
[head]
<meta name="description" content="An in-depth guide to battle and move mechanics of the Generation I games." />
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[page]
<div class="author">By <a href="/forums/members/plague-von-karma.236353/">Plague von Karma</a>. Art by <a href="/forums/members/plague-von-karma.236353/">Plague von Karma</a>.</div>
<img src="/ingame/guides/rby_mechanics_guide_art.png" alt="art" style="float: none; margin: 0 auto; display: block;" />
<h2 id="introduction">Introduction</h2>
<p>The first generation of Pok&eacute;mon is infamous for its glitches and weird mechanics. These largely define the way the game is played, and, therefore, it's crucial to understand them if one aims to succeed. For Smogon, we usually simulate the international version of Pok&eacute;mon Yellow on Pok&eacute;mon Showdown!, which matters because there are even glitches unique to the Stadium and Japanese versions of Generation 1. To keep things simple for this guide, we will strictly be going over Smogon-applicable RBY mechanics; i.e., those found in the international version of Yellow.</p>
<p>To preface, there will be times where we discuss a concept known as a "desync." This is a term covering glitches in Link Battles that lead to them "desynchronizing," causing communication errors. This effectively causes players to engage in different battles from each other, eventually leading to the appearance of glitch Pok&eacute;mon, glitch moves, and more. On battle simulators, these generally aren't implemented. Should they not be ignored outright, workarounds are used to "prevent" them from occurring, such as the Desync Clause Mod on Pok&eacute;mon Showdown, which changes desync situations to result in move failure.</p>
<p>To make things easier to understand, we will divide things into two sections: Battle Mechanics and Move Mechanics.</p>
<div id="toc">
<h3>Table of Contents</h3>
<ul>
<li><a href="#" data-show-link="battle"><i class="fa fa-caret-right"></i> Battle Mechanics</a></li>
<li>
<ul data-link="battle">
<li><a href="#special-stat">Special Stat</a></li>
<li><a href="#dv-stat-exp">DVs and Stat Exp</a></li>
<li><a href="#critical-hits">Critical Hits</a></li>
<li><a href="#type">Type Chart Differences and Type-based Attack Categories</a></li>
<li><a href="#immunity">Same-type Status Immunity</a></li>
<li><a href="#stat-mechanics">Stat Mechanics</a></li>
<li><a href="#freeze">Freeze</a></li>
<li><a href="#sleep">Sleep</a></li>
<li><a href="#confusion">Confusion</a></li>
<li><a href="#status">Paralysis, Burn, and Poison</a></li>
<li><a href="#turn-end">Turn End Mechanics</a></li>
<li><a href="#multi-hit">Multi-hit Damage Calculation</a></li>
<li><a href="#partial-trapping">Partial Trapping</a></li>
<li><a href="#accuracy-effect">1/256 Accuracy and Effect Chance</a></li>
<li><a href="#recovery-fail">Recovery Move Failure</a></li>
<li><a href="#damage-storing">Damage Storing Mechanic</a></li>
</ul>
</li>
<li><a href="#" data-show-link="move"><i class="fa fa-caret-right"></i> Move Mechanics</a></li>
<li>
<ul data-link="move">
<li><a href="#acid">Acid, Aurora Beam, Bubble, Bubble Beam, and Constrict</a></li>
<li><a href="#bide">Bide</a></li>
<li><a href="#bind">Bind</a></li>
<li><a href="#bite">Bite</a></li>
<li><a href="#conversion">Conversion</a></li>
<li><a href="#counter">Counter</a></li>
<li><a href="#dig-fly">Dig and Fly</a></li>
<li><a href="#disable">Disable</a></li>
<li><a href="#dizzy-punch">Dizzy Punch</a></li>
<li><a href="#double-edge">Double-Edge</a></li>
<li><a href="#earthquake">Earthquake</a></li>
<li><a href="#explosion-selfdestruct">Explosion and Self-Destruct</a></li>
<li><a href="#fire-blast">Fire Blast</a></li>
<li><a href="#ohko-moves">Fissure, Guillotine, and Horn Drill</a></li>
<li><a href="#glare">Glare</a></li>
<li><a href="#gust">Gust</a></li>
<li><a href="#haze">Haze</a></li>
<li><a href="#hjk-jump-kick">High Jump Kick and Jump Kick</a></li>
<li><a href="#hyper-beam">Hyper Beam</a></li>
<li><a href="#karate-chop">Karate Chop</a></li>
<li><a href="#leech-seed">Leech Seed</a></li>
<li><a href="#low-kick">Low Kick</a></li>
<li><a href="#mimic">Mimic</a></li>
<li><a href="#minimize">Minimize</a></li>
<li><a href="#mirror-move">Mirror Move</a></li>
<li><a href="#night-shade-seismic-toss">Night Shade and Seismic Toss</a></li>
<li><a href="#poison-sting">Poison Sting</a></li>
<li><a href="#psychic">Psychic</a></li>
<li><a href="#psywave">Psywave</a></li>
<li><a href="#quick-attack">Quick Attack</a></li>
<li><a href="#rage-petal-dance-thrash">Rage, Petal Dance, and Thrash</a></li>
<li><a href="#charge-moves">Razor Wind, Sky Attack, Skull Bash, and Solar Beam</a></li>
<li><a href="#recover-soft-boiled">Recover and Soft-boiled</a></li>
<li><a href="#screens-mist">Reflect, Light Screen, and Mist</a></li>
<li><a href="#rest">Rest</a></li>
<li><a href="#rock-slide">Rock Slide</a></li>
<li><a href="#roar-whirlwind">Roar and Whirlwind</a></li>
<li><a href="#sand-attack">Sand Attack</a></li>
<li><a href="#stomp">Stomp</a></li>
<li><a href="#substitute">Substitute</a></li>
<li><a href="#struggle">Struggle</a></li>
<li><a href="#thunder">Thunder</a></li>
<li><a href="#teleport">Teleport</a></li>
<li><a href="#toxic">Toxic</a></li>
<li><a href="#transform">Transform</a></li>
<li><a href="#tri-attack">Tri Attack</a></li>
</ul>
</li>
</ul>
</div>
<hr />
<h2>Part 1: Battle Mechanics</h2>
<p>To understand how everything works, it's important to first understand how the battle system works. There's no Mega Evolution, Z-Moves, Dynamax, etc in RBY. Not only that, there aren't any Fairy-, Dark-, or Steel-types, nor are there any items or abilities, already making for a substantially different metagame. Let's get into the actual mechanics, though.</p>
<h3 id="special-stat">Special Stat</h3>
<img src="//play.pokemonshowdown.com/sprites/gen1rb/slowbro.png" alt="Slowbro" />
<p>In RBY, Special Attack and Special Defense are merged into one, singular "Special" stat. Therefore, if Special is increased or decreased, this will improve your offensive and defensive capabilities concerning special attacks. This makes Amnesia act like two Calm Mind uses, making Pok&eacute;mon like Slowbro scary foes to face. Psychic also becomes a particularly scary move, as it drops Special a third of the time, which is effectively a double debuff.</p>
<h3 id="dv-stat-exp">DVs and Stat Exp</h3>
<p>It is possible to max every one of your Pok&eacute;mon's stats, which makes for a much bulkier metagame. Generally, Pok&eacute;mon like Chansey and Snorlax become much tougher foes to KO, often requiring a concentrated effort from multiple Pok&eacute;mon to take down. This is a vital concept to grasp, especially in a world where there are no items and many moves have low Base Power.</p>
<img src="//play.pokemonshowdown.com/sprites/gen1rb/snorlax.png" alt="Snorlax" class="left" />
<p>DVs and Stat Exp are RBY and GSC's equivalent to IVs and EVs, capping at 15 and 65535, respectively. The HP DV is determined by all the other stats, with every instance of an odd DV increasing the HP DV as follows; +8 HP DVs for Attack having an odd DV, 4 for Defense, 2 for Speed, and 1 for Special, adding up to the maximum of 15. The other DVs are determined at random, but because a Pok&eacute;mon's encounter rate is one variable in DV randomization, not all Pok&eacute;mon can get max DVs in every stat. Stat Exp is gained through the foe's raw base stats and is applied upon leveling up rather than immediately, which can make training take a long time. There is no limit on how much can be invested into individual stats, so you can cap every single one.</p>
<p>For any individual raw stat, Stat Exp and DVs combined will amount to the same as a modern Pok&eacute;mon's stat with full EVs and IVs but without a nature. In high-level play, there is little incentive to selectively invest in any given stat, though this isn't to say it's useless. Tanking Attack to 1 DV and 0 Stat Exp for reducing confusion damage is somewhat relevant; you need 1 Attack DV to ensure the HP DV reaches 15 in this situation, as otherwise, it drops to 7. Tanking the Attack stat will cause the Pok&eacute;mon to lose Struggle wars more frequently, though, so for Pok&eacute;mon like Chansey, lowering Attack can be problematic. Reducing stats to prevent stat debuff overflows is relevant for powerhouses like Mewtwo as well: more on this later.</p>
<h3 id="critical-hits">Critical Hits</h3>
<img src="//play.pokemonshowdown.com/sprites/gen1/electrode.png" alt="Electrode" />
<p>Critical hit rates are based on a Pok&eacute;mon's base Speed: the faster the Pok&eacute;mon, the higher the chance. The following equation defines a Pok&eacute;mon's regular critical hit rate: the faster the Pok&eacute;mon, the higher the chance. The following equation defines a Pok&eacute;mon's regular critical hit rate sprite: Base Speed * 100 / 512. Due to this formula, the fastest Pok&eacute;mon of the generation, Electrode, gets a 27.3% critical hit rate. On the lower end of the spectrum, it gives Snorlax a 5.85% critical hit rate, similar to that of later generations. For a list containing each Pok&eacute;mon's regular critical hit rate, go <a href="/rb/articles/critical_hits" target="_blank">here</a>.</p>
<p>The damage dealt by a critical hit is partially based on the Pok&eacute;mon's level, and, at Level 100, it rounds out to about twice the damage; the multiplier is around 1.95x. Critical hits will ignore any stat changes from either Pok&eacute;mon during damage calculation; ergo, any Attack or Special boosts from both Pok&eacute;mon will be ignored. Consequently, a fast setup sweeper will have an inherent decrease in consistency, as a critical hit will end up lowering its damage output. This also means that Swords Dance will not boost Slash, and Amnesia will not boost Crabhammer, at least if they don't land a critical hit. With this rule in mind, critical hits will also ignore things like opposing Defense boosts, Reflect, and Light Screen, which is a good trade-off for Pok&eacute;mon like Persian, and in this case, largely defines its niche. Make no mistake: critical hits are very powerful.</p>
<p>Slash, Crabhammer, Razor Leaf, and Karate Chop possess an effect that increases the user's critical hit rate by 8x, making the formula Base Speed * 100 / 64. Many Pok&eacute;mon&mdash;even those with somewhat average base Speed&mdash;will end up achieving very high critical hit rates with this mechanic, making the moves sort of like Frost Breath in modern generations. However, the chance for a critical hit will cap out at 99.6% due to a glitch in how the game determines whether a critical hit has landed, meaning that these moves landing a critical hit is never guaranteed.</p>
<p>Focus Energy, due to a glitch, ends up decreasing the user's critical hit rate by 4x, making the formula Base Speed * 100 / 2048. Theoretically, it can be used to prevent critical hits from occurring, but it isn't worth the moveslot, so it doesn't see use in high-level play.</p>
<h3 id="type">Type Chart Differences and Type-based Attack Categories</h3>
<p>Since RBY is a generation prior to the physical / special split, attack categories are based on typing. For example, Normal-type moves like Hyper Beam are always physical, and Water-type moves like Clamp are always special. Ergo, Pok&eacute;mon like Kabutops are hard-pressed to find good STAB moves, while others such as Golem act as they always do in later generations.</p>
<p>Here is a table showing the categories:</p>
<table class="rby-table" style="max-width: 300px;">
<tr>
<th>Physical</th>
<th>Special</th>
</tr>
<tr>
<td>Normal</td>
<td>Grass</td>
</tr>
<tr>
<td>Fighting</td>
<td>Fire</td>
</tr>
<tr>
<td>Rock</td>
<td>Water</td>
</tr>
<tr>
<td>Ground</td>
<td>Ice</td>
</tr>
<tr>
<td>Ghost</td>
<td>Electric</td>
</tr>
<tr>
<td>Flying</td>
<td>Psychic</td>
</tr>
<tr>
<td>Poison</td>
<td>Dragon*</td>
</tr>
<tr>
<td>Bug</td>
<td></td>
</tr>
</table>
<p><em>* Dragon is considered Special, but, due to it only having Dragon Rage, it doesn't actually see use.</em></p>
<p>On top of this, there are some type chart differences.</p>
<ul class="list">
<li>Poison is super effective against Bug and vice versa.</li>
<li>Fire does not resist Ice.</li>
<li>Ghost does not affect Psychic.</li>
</ul>
<p>The Dark, Steel, and Fairy types are not present either. As a result of this, Magneton is mono-Electric, Clefable and Wigglytuff are mono-Normal along with their pre-evolutions, and Mr. Mime is mono-Psychic.</p>
<h3 id="immunity">Same-type Status Immunity</h3>
<p>An intended mechanic, as shown in Pok&eacute;mon Stadium 2; if a Pok&eacute;mon has the same type as a move used on it, any major statuses from move secondary effects are nullified. As a result of this mechanic, Electric-types cannot be paralyzed by Thunderbolt and Ice-types cannot be frozen by Ice Beam, for example. The only exception to this rule is Twineedle, which can still poison Bug-types. To add on to this, Poison-types cannot be poisoned full stop, not even by manually inducing poison with Toxic or Poison Powder, so Twineedle cannot poison Poison-types either. The big game-changer here, however, is that Normal-types cannot be paralyzed by Body Slam.</p>
<h3 id="stat-mechanics">Stat Reapplication Glitch, Ignoring Stat Drops from Status, Stat Cap, and Stat Drop Overflow</h3>
<p>The side effects of burn and paralysis&mdash;halving Attack and quartering Speed&mdash;can be reapplied if a Pok&eacute;mon's stats are changed. For example, if Slowbro paralyzes Alakazam with Thunder Wave and then uses Amnesia, the Speed drop from paralysis will apply twice. Similarly, if Flareon burns a Pok&eacute;mon and uses Tail Whip, their Defense will drop and their Attack will be halved twice.</p>
<img src="//play.pokemonshowdown.com/sprites/gen1/kingler.png" alt="Kingler" class="left" />
<p>Conversely, using moves that boost Attack or Speed can allow a Pok&eacute;mon to ignore their stat drops from burn and paralysis, respectively. For example, if Kingler is burned and uses Swords Dance, its Attack will increase, ignoring the halving effect from the burn while still taking damage. Or, in the case of paralysis, Dragonite can use Agility to ignore the Speed drop while still having the chance to skip a turn.</p>
<p>All stats in RBY will cap at 999. In the case a move would boost past this, the game will set the stat to 999 if it was below 999, or make the move fail otherwise. For example, if a Venusaur with 298 Special were to use Growth to +5, it would cap the stat at 999 instead of letting it reach 1043. Because of the 999 stat cap, all further uses will fail, applying a "-1 deduction" on top of the move's existing stat stage change.</p>
<img src="//play.pokemonshowdown.com/sprites/gen1rb/pinsir.png" alt="Pinsir" />
<p>For moves that boost by one stage, like Meditate, the -1 deduction cancels out the move's boost as intended. In the case of moves that boost twice, such as Swords Dance, the -1 deduction will still apply. However, it went unnoticed that this gives a net gain of +1, allowing stat stages to "rise" once more, albeit still capped. Ergo, if a Pinsir were to raise its Attack to +4 using Swords Dance, which has the stat cap at 999, it can still technically go to +5 with no visible changes. It cannot, however, reach +6, as Swords Dance can only increase by +1 from +5, so the -1 deduction actually works. This, in most cases, is irrelevant to gameplay.</p>
<img src="//play.pokemonshowdown.com/sprites/gen1rg/mewtwo.png" alt="Mewtwo" class="left" />
<p>It is possible for stats that "rose" beyond the 999 stat cap to overflow if a debuff is sustained. The cap doesn't actually get applied when debuffs occur, and since the damage calculation is incapable of handling stats beyond 1023, debuffs will lead to an overflow. Let's say Mewtwo reaches +5 Special, or 1421 without the stat cap. If it sustains a debuff from something like Psychic, this Special will overflow into an extremely low number, and if you consider the Special stat serving as an offensive and defensive stat, you can imagine how comical it is to watch even Absorb OHKO it.</p>
<h3 id="freeze">Freeze</h3>
<p>If a Pok&eacute;mon is frozen, it cannot be thawed without an item, being hit by Haze, or being hit with a move that can burn. The latter means that Ember, Fire Punch, Flamethrower, and Fire Blast are all valid moves to thaw a foe. As a result, if you're frozen, it is completely on the opponent to thaw you, and most competitive teams don't use moves that can do this. This makes the freeze status a pseudo-KO. It should be noted that Fire Spin, due to not having a burn chance, cannot thaw foes.</p>
<p>However, in the case a Pok&eacute;mon is thawed by a faster Pok&eacute;mon and tries to use a move, this can cause a desync. On one side, the Pok&eacute;mon will use the move they chose in the previous turn, while on the other, a glitch move will be used due to the game skipping the "FIGHT" menu.</p>
<p>For a far more detailed analysis, look <a href="//www.youtube.com/watch?v=iSSf4XaqGAU&amp;ab_channel=Crystal_" target="_blank">here</a>.</p>
<h3 id="sleep">Sleep</h3>
<img src="//play.pokemonshowdown.com/sprites/gen1/gengar.png" alt="Gengar" />
<p>Sleep can last up to 6 turns, including a '0 turn sleep' where the target Pok&eacute;mon wakes up the same turn it was put to sleep. Sleep turns are determined upon the status being inflicted; therefore, there is, effectively, a 1/7 chance of it waking up on each turn up until turn 6. This makes sleep a very powerful status, as it can definitely be equivalent to KOing a Pok&eacute;mon in some circumstances. Furthermore, a Pok&eacute;mon cannot act on the turn it wakes up, so it's possible to repeatedly put a Pok&eacute;mon to sleep if the user is faster. As such, it isn't uncommon to see Pok&eacute;mon like Gengar trying to land their sleep moves for extended periods of time.</p>
<p>If a Pok&eacute;mon has used Hyper Beam the same turn prior to a sleep move's use, the sleep move will not only skip accuracy checks but also ignore any status when putting the opposing Pok&eacute;mon to sleep. As a result, this is the only circumstance in which it's possible to status an already-statused Pok&eacute;mon.</p>
<h3 id="confusion">Confusion</h3>
<p>Confusion damage uses the Pok&eacute;mon's raw Attack stat, dealing typeless, physical damage. Confusion lasts 1-4 turns and there is a 50% chance the Pok&eacute;mon will attack itself. Considering the odds, there is a 76.6% chance the Pok&eacute;mon will attack itself at least once. Confusion damage will ignore Reflect and has no damage variance. However, it will consider stat boosts; this means Swords Dance will increase the damage and Acid Armor will decrease it. Considering burns halve your Pok&eacute;mon's Attack, being burned will reduce the damage it takes.</p>
<p>Decreasing investment in Attack will influence confusion damage, as it uses the raw stat. With the Attack tanking concept from the stat section in mind, Alakazam can decrease the damage it takes from 37 (11.8%) to 21 (6.8%), almost halving it.</p>
<p>Here is a table showing the regular damage a Pok&eacute;mon will take from confusion:</p>
<input type="button" value="Click to toggle table!" data-show-target="confusion" id="confusion-table" />
<div class="big-table" data-target="confusion">
<table class="rby-table">
<tr>
<th>Pok&eacute;mon</th>
<th>1 Atk DV + 0 Stat Exp Dmg</th>
<th>Max Stat Dmg</th>
<th>Min %</th>
<th>Max %</th>
</tr>
<tr>
<td>Bulbasaur</td>
<td>20</td>
<td>35</td>
<td>6.8%</td>
<td>11.9%</td>
</tr>
<tr>
<td>Ivysaur</td>
<td>21</td>
<td>35</td>
<td>6.5%</td>
<td>10.8%</td>
</tr>
<tr>
<td>Venusaur</td>
<td>23</td>
<td>35</td>
<td>6.3%</td>
<td>9.6%</td>
</tr>
<tr>
<td>Charmander</td>
<td>22</td>
<td>38</td>
<td>7.8%</td>
<td>13.5%</td>
</tr>
<tr>
<td>Charmeleon</td>
<td>23</td>
<td>37</td>
<td>7.2%</td>
<td>11.6%</td>
</tr>
<tr>
<td>Charizard</td>
<td>25</td>
<td>37</td>
<td>7.0%</td>
<td>10.3%</td>
</tr>
<tr>
<td>Squirtle</td>
<td>17</td>
<td>30</td>
<td>5.8%</td>
<td>10.3%</td>
</tr>
<tr>
<td>Wartortle</td>
<td>19</td>
<td>31</td>
<td>5.9%</td>
<td>9.7%</td>
</tr>
<tr>
<td>Blastoise</td>
<td>21</td>
<td>31</td>
<td>5.8%</td>
<td>8.6%</td>
</tr>
<tr>
<td>Caterpie</td>
<td>15</td>
<td>33</td>
<td>5.1%</td>
<td>11.3%</td>
</tr>
<tr>
<td>Metapod</td>
<td>9</td>
<td>24</td>
<td>3.0%</td>
<td>7.9%</td>
</tr>
<tr>
<td>Butterfree</td>
<td>18</td>
<td>33</td>
<td>5.6%</td>
<td>10.2%</td>
</tr>
<tr>
<td>Weedle</td>
<td>18</td>
<td>37</td>
<td>6.4%</td>
<td>13.1%</td>
</tr>
<tr>
<td>Kakuna</td>
<td>11</td>
<td>27</td>
<td>3.8%</td>
<td>9.2%</td>
</tr>
<tr>
<td>Beedrill</td>
<td>33</td>
<td>50</td>
<td>9.9%</td>
<td>15.0%</td>
</tr>
<tr>
<td>Pidgey</td>
<td>20</td>
<td>37</td>
<td>7.1%</td>
<td>13.1%</td>
</tr>
<tr>
<td>Pidgeotto</td>
<td>22</td>
<td>37</td>
<td>6.7%</td>
<td>11.2%</td>
</tr>
<tr>
<td>Pidgeot</td>
<td>24</td>
<td>36</td>
<td>6.5%</td>
<td>9.8%</td>
</tr>
<tr>
<td>Rattata</td>
<td>25</td>
<td>44</td>
<td>9.5%</td>
<td>16.7%</td>
</tr>
<tr>
<td>Raticate</td>
<td>28</td>
<td>42</td>
<td>8.9%</td>
<td>13.4%</td>
</tr>
<tr>
<td>Spearow</td>
<td>29</td>
<td>48</td>
<td>10.2%</td>
<td>17.0%</td>
</tr>
<tr>
<td>Fearow</td>
<td>29</td>
<td>42</td>
<td>8.7%</td>
<td>12.6%</td>
</tr>
<tr>
<td>Ekans</td>
<td>24</td>
<td>41</td>
<td>8.8%</td>
<td>15.0%</td>
</tr>
<tr>
<td>Arbok</td>
<td>27</td>
<td>40</td>
<td>8.4%</td>
<td>12.4%</td>
</tr>
<tr>
<td>Pikachu</td>
<td>26</td>
<td>46</td>
<td>9.5%</td>
<td>16.8%</td>
</tr>
<tr>
<td>Raichu</td>
<td>32</td>
<td>46</td>
<td>9.9%</td>
<td>14.2%</td>
</tr>
<tr>
<td>Sandshrew</td>
<td>21</td>
<td>33</td>
<td>6.9%</td>
<td>10.9%</td>
</tr>
<tr>
<td>Sandslash</td>
<td>23</td>
<td>33</td>
<td>6.5%</td>
<td>9.3%</td>
</tr>
<tr>
<td>Nidoran-F</td>
<td>18</td>
<td>33</td>
<td>5.8%</td>
<td>10.5%</td>
</tr>
<tr>
<td>Nidorina</td>
<td>20</td>
<td>34</td>
<td>5.8%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Nidoqueen</td>
<td>23</td>
<td>34</td>
<td>6.0%</td>
<td>8.9%</td>
</tr>
<tr>
<td>Nidoran-M</td>
<td>24</td>
<td>42</td>
<td>8.1%</td>
<td>14.2%</td>
</tr>
<tr>
<td>Nidorino</td>
<td>25</td>
<td>40</td>
<td>7.7%</td>
<td>12.3%</td>
</tr>
<tr>
<td>Nidoking</td>
<td>27</td>
<td>39</td>
<td>7.4%</td>
<td>10.7%</td>
</tr>
<tr>
<td>Clefairy</td>
<td>18</td>
<td>34</td>
<td>5.2%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Clefable</td>
<td>22</td>
<td>34</td>
<td>5.6%</td>
<td>8.7%</td>
</tr>
<tr>
<td>Vulpix</td>
<td>18</td>
<td>35</td>
<td>6.5%</td>
<td>12.5%</td>
</tr>
<tr>
<td>Ninetales</td>
<td>23</td>
<td>35</td>
<td>6.6%</td>
<td>10.0%</td>
</tr>
<tr>
<td>Jigglypuff</td>
<td>25</td>
<td>47</td>
<td>5.8%</td>
<td>10.9%</td>
</tr>
<tr>
<td>Wigglytuff</td>
<td>28</td>
<td>44</td>
<td>5.8%</td>
<td>9.1%</td>
</tr>
<tr>
<td>Zubat</td>
<td>21</td>
<td>39</td>
<td>7.4%</td>
<td>13.8%</td>
</tr>
<tr>
<td>Golbat</td>
<td>25</td>
<td>38</td>
<td>7.1%</td>
<td>10.8%</td>
</tr>
<tr>
<td>Oddish</td>
<td>19</td>
<td>33</td>
<td>6.5%</td>
<td>11.3%</td>
</tr>
<tr>
<td>Gloom</td>
<td>21</td>
<td>34</td>
<td>6.5%</td>
<td>10.5%</td>
</tr>
<tr>
<td>Vileplume</td>
<td>22</td>
<td>34</td>
<td>6.2%</td>
<td>9.6%</td>
</tr>
<tr>
<td>Paras</td>
<td>25</td>
<td>40</td>
<td>9.2%</td>
<td>14.7%</td>
</tr>
<tr>
<td>Parasect</td>
<td>27</td>
<td>39</td>
<td>8.4%</td>
<td>12.1%</td>
</tr>
<tr>
<td>Venonat</td>
<td>21</td>
<td>37</td>
<td>6.5%</td>
<td>11.5%</td>
</tr>
<tr>
<td>Venomoth</td>
<td>23</td>
<td>37</td>
<td>6.7%</td>
<td>10.8%</td>
</tr>
<tr>
<td>Diglett</td>
<td>28</td>
<td>49</td>
<td>12.6%</td>
<td>22.0%</td>
</tr>
<tr>
<td>Dugtrio</td>
<td>30</td>
<td>45</td>
<td>11.0%</td>
<td>16.5%</td>
</tr>
<tr>
<td>Meowth</td>
<td>21</td>
<td>39</td>
<td>7.4%</td>
<td>13.8%</td>
</tr>
<tr>
<td>Persian</td>
<td>24</td>
<td>38</td>
<td>7.2%</td>
<td>11.4%</td>
</tr>
<tr>
<td>Psyduck</td>
<td>21</td>
<td>36</td>
<td>6.9%</td>
<td>11.9%</td>
</tr>
<tr>
<td>Golduck</td>
<td>24</td>
<td>36</td>
<td>6.6%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Mankey</td>
<td>35</td>
<td>53</td>
<td>12.4%</td>
<td>18.7%</td>
</tr>
<tr>
<td>Primeape</td>
<td>35</td>
<td>49</td>
<td>10.5%</td>
<td>14.7%</td>
</tr>
<tr>
<td>Growlithe</td>
<td>28</td>
<td>44</td>
<td>8.9%</td>
<td>14.1%</td>
</tr>
<tr>
<td>Arcanine</td>
<td>31</td>
<td>43</td>
<td>8.1%</td>
<td>11.2%</td>
</tr>
<tr>
<td>Poliwag</td>
<td>22</td>
<td>39</td>
<td>7.8%</td>
<td>13.8%</td>
</tr>
<tr>
<td>Poliwhirl</td>
<td>22</td>
<td>35</td>
<td>6.6%</td>
<td>10.5%</td>
</tr>
<tr>
<td>Poliwrath</td>
<td>22</td>
<td>33</td>
<td>5.7%</td>
<td>8.6%</td>
</tr>
<tr>
<td>Abra</td>
<td>14</td>
<td>38</td>
<td>5.5%</td>
<td>15.0%</td>
</tr>
<tr>
<td>Kadabra</td>
<td>18</td>
<td>37</td>
<td>6.4%</td>
<td>13.1%</td>
</tr>
<tr>
<td>Alakazam</td>
<td>21</td>
<td>37</td>
<td>6.7%</td>
<td>11.8%</td>
</tr>
<tr>
<td>Machop</td>
<td>30</td>
<td>45</td>
<td>8.7%</td>
<td>13.1%</td>
</tr>
<tr>
<td>Machoke</td>
<td>31</td>
<td>44</td>
<td>8.5%</td>
<td>12.1%</td>
</tr>
<tr>
<td>Machamp</td>
<td>36</td>
<td>48</td>
<td>9.4%</td>
<td>12.5%</td>
</tr>
<tr>
<td>Bellsprout</td>
<td>33</td>
<td>51</td>
<td>10.9%</td>
<td>16.8%</td>
</tr>
<tr>
<td>Weepinbell</td>
<td>33</td>
<td>49</td>
<td>9.9%</td>
<td>14.7%</td>
</tr>
<tr>
<td>Victreebel</td>
<td>33</td>
<td>47</td>
<td>9.1%</td>
<td>12.9%</td>
</tr>
<tr>
<td>Tentacool</td>
<td>19</td>
<td>37</td>
<td>6.7%</td>
<td>13.1%</td>
</tr>
<tr>
<td>Tentacruel</td>
<td>23</td>
<td>37</td>
<td>6.3%</td>
<td>10.2%</td>
</tr>
<tr>
<td>Geodude</td>
<td>20</td>
<td>31</td>
<td>7.1%</td>
<td>11.0%</td>
</tr>
<tr>
<td>Graveler</td>
<td>22</td>
<td>31</td>
<td>7.0%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Golem</td>
<td>23</td>
<td>31</td>
<td>6.3%</td>
<td>8.5%</td>
</tr>
<tr>
<td>Ponyta</td>
<td>30</td>
<td>45</td>
<td>9.9%</td>
<td>14.9%</td>
</tr>
<tr>
<td>Rapidash</td>
<td>31</td>
<td>44</td>
<td>9.3%</td>
<td>13.2%</td>
</tr>
<tr>
<td>Slowpoke</td>
<td>22</td>
<td>35</td>
<td>5.7%</td>
<td>9.1%</td>
</tr>
<tr>
<td>Slowbro</td>
<td>18</td>
<td>28</td>
<td>4.6%</td>
<td>7.1%</td>
</tr>
<tr>
<td>Magnemite</td>
<td>12</td>
<td>25</td>
<td>4.7%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Magneton</td>
<td>16</td>
<td>27</td>
<td>5.3%</td>
<td>8.9%</td>
</tr>
<tr>
<td>Farfetch'd</td>
<td>24</td>
<td>38</td>
<td>7.8%</td>
<td>12.4%</td>
</tr>
<tr>
<td>Doduo</td>
<td>33</td>
<td>49</td>
<td>12.1%</td>
<td>17.9%</td>
</tr>
<tr>
<td>Dodrio</td>
<td>34</td>
<td>46</td>
<td>10.5%</td>
<td>14.2%</td>
</tr>
<tr>
<td>Seel</td>
<td>17</td>
<td>32</td>
<td>5.1%</td>
<td>9.6%</td>
</tr>
<tr>
<td>Dewgong</td>
<td>21</td>
<td>32</td>
<td>5.5%</td>
<td>8.4%</td>
</tr>
<tr>
<td>Grimer</td>
<td>30</td>
<td>45</td>
<td>8.3%</td>
<td>12.4%</td>
</tr>
<tr>
<td>Muk</td>
<td>31</td>
<td>43</td>
<td>7.5%</td>
<td>10.4%</td>
</tr>
<tr>
<td>Shellder</td>
<td>17</td>
<td>27</td>
<td>6.5%</td>
<td>10.3%</td>
</tr>
<tr>
<td>Cloyster</td>
<td>16</td>
<td>23</td>
<td>5.3%</td>
<td>7.6%</td>
</tr>
<tr>
<td>Gastly</td>
<td>18</td>
<td>37</td>
<td>6.8%</td>
<td>14.1%</td>
</tr>
<tr>
<td>Haunter</td>
<td>21</td>
<td>37</td>
<td>7.2%</td>
<td>12.6%</td>
</tr>
<tr>
<td>Gengar</td>
<td>23</td>
<td>37</td>
<td>7.1%</td>
<td>11.5%</td>
</tr>
<tr>
<td>Onix</td>
<td>9</td>
<td>17</td>
<td>3.3%</td>
<td>6.2%</td>
</tr>
<tr>
<td>Drowzee</td>
<td>20</td>
<td>36</td>
<td>6.2%</td>
<td>11.1%</td>
</tr>
<tr>
<td>Hypno</td>
<td>23</td>
<td>36</td>
<td>6.2%</td>
<td>9.7%</td>
</tr>
<tr>
<td>Krabby</td>
<td>28</td>
<td>39</td>
<td>10.6%</td>
<td>14.8%</td>
</tr>
<tr>
<td>Kingler</td>
<td>29</td>
<td>38</td>
<td>9.3%</td>
<td>12.1%</td>
</tr>
<tr>
<td>Voltorb</td>
<td>13</td>
<td>28</td>
<td>4.6%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Electrode</td>
<td>17</td>
<td>29</td>
<td>5.3%</td>
<td>9.0%</td>
</tr>
<tr>
<td>Exeggcute</td>
<td>13</td>
<td>25</td>
<td>4.0%</td>
<td>7.7%</td>
</tr>
<tr>
<td>Exeggutor</td>
<td>26</td>
<td>38</td>
<td>6.6%</td>
<td>9.7%</td>
</tr>
<tr>
<td>Cubone</td>
<td>14</td>
<td>25</td>
<td>4.6%</td>
<td>8.3%</td>
</tr>
<tr>
<td>Marowak</td>
<td>19</td>
<td>29</td>
<td>5.9%</td>
<td>9.0%</td>
</tr>
<tr>
<td>Hitmonlee</td>
<td>42</td>
<td>57</td>
<td>13.9%</td>
<td>18.8%</td>
</tr>
<tr>
<td>Hitmonchan</td>
<td>30</td>
<td>42</td>
<td>9.9%</td>
<td>13.9%</td>
</tr>
<tr>
<td>Lickitung</td>
<td>17</td>
<td>30</td>
<td>4.4%</td>
<td>7.8%</td>
</tr>
<tr>
<td>Koffing</td>
<td>17</td>
<td>28</td>
<td>6.0%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Weezing</td>
<td>20</td>
<td>29</td>
<td>6.0%</td>
<td>8.7%</td>
</tr>
<tr>
<td>Rhyhorn</td>
<td>22</td>
<td>33</td>
<td>6.1%</td>
<td>9.1%</td>
</tr>
<tr>
<td>Rhydon</td>
<td>28</td>
<td>37</td>
<td>6.8%</td>
<td>9.0%</td>
</tr>
<tr>
<td>Chansey</td>
<td>7</td>
<td>35</td>
<td>1.0%</td>
<td>5.0%</td>
</tr>
<tr>
<td>Tangela</td>
<td>13</td>
<td>23</td>
<td>3.9%</td>
<td>6.9%</td>
</tr>
<tr>
<td>Kangaskhan</td>
<td>27</td>
<td>39</td>
<td>6.5%</td>
<td>9.4%</td>
</tr>
<tr>
<td>Horsea</td>
<td>14</td>
<td>27</td>
<td>5.3%</td>
<td>10.3%</td>
</tr>
<tr>
<td>Seadra</td>
<td>17</td>
<td>28</td>
<td>5.4%</td>
<td>8.9%</td>
</tr>
<tr>
<td>Goldeen</td>
<td>23</td>
<td>37</td>
<td>7.8%</td>
<td>12.6%</td>
</tr>
<tr>
<td>Seaking</td>
<td>30</td>
<td>43</td>
<td>8.3%</td>
<td>11.8%</td>
</tr>
<tr>
<td>Staryu</td>
<td>17</td>
<td>32</td>
<td>6.5%</td>
<td>12.2%</td>
</tr>
<tr>
<td>Starmie</td>
<td>21</td>
<td>33</td>
<td>6.5%</td>
<td>10.2%</td>
</tr>
<tr>
<td>Mr. Mime</td>
<td>16</td>
<td>29</td>
<td>5.7%</td>
<td>10.2%</td>
</tr>
<tr>
<td>Scyther</td>
<td>31</td>
<td>43</td>
<td>9.0%</td>
<td>12.5%</td>
</tr>
<tr>
<td>Jynx</td>
<td>23</td>
<td>41</td>
<td>6.9%</td>
<td>12.3%</td>
</tr>
<tr>
<td>Electabuzz</td>
<td>29</td>
<td>43</td>
<td>8.7%</td>
<td>12.9%</td>
</tr>
<tr>
<td>Magmar</td>
<td>33</td>
<td>47</td>
<td>9.9%</td>
<td>14.1%</td>
</tr>
<tr>
<td>Pinsir</td>
<td>30</td>
<td>41</td>
<td>9.0%</td>
<td>12.3%</td>
</tr>
<tr>
<td>Tauros</td>
<td>26</td>
<td>36</td>
<td>7.4%</td>
<td>10.2%</td>
</tr>
<tr>
<td>Magikarp</td>
<td>6</td>
<td>21</td>
<td>2.5%</td>
<td>8.6%</td>
</tr>
<tr>
<td>Gyarados</td>
<td>35</td>
<td>47</td>
<td>8.9%</td>
<td>12.0%</td>
</tr>
<tr>
<td>Lapras</td>
<td>25</td>
<td>36</td>
<td>5.4%</td>
<td>7.8%</td>
</tr>
<tr>
<td>Ditto</td>
<td>19</td>
<td>35</td>
<td>6.4%</td>
<td>11.7%</td>
</tr>
<tr>
<td>Eevee</td>
<td>21</td>
<td>37</td>
<td>6.7%</td>
<td>11.8%</td>
</tr>
<tr>
<td>Vaporeon</td>
<td>23</td>
<td>37</td>
<td>5.0%</td>
<td>8.0%</td>
</tr>
<tr>
<td>Jolteon</td>
<td>23</td>
<td>37</td>
<td>6.9%</td>
<td>11.1%</td>
</tr>
<tr>
<td>Flareon</td>
<td>43</td>
<td>57</td>
<td>12.9%</td>
<td>17.1%</td>
</tr>
<tr>
<td>Porygon</td>
<td>19</td>
<td>32</td>
<td>5.7%</td>
<td>9.6%</td>
</tr>
<tr>
<td>Omanyte</td>
<td>11</td>
<td>22</td>
<td>4.0%</td>
<td>8.1%</td>
</tr>
<tr>
<td>Omastar</td>
<td>14</td>
<td>23</td>
<td>4.1%</td>
<td>6.7%</td>
</tr>
<tr>
<td>Kabuto</td>
<td>22</td>
<td>33</td>
<td>8.4%</td>
<td>12.5%</td>
</tr>
<tr>
<td>Kabutops</td>
<td>27</td>
<td>37</td>
<td>8.4%</td>
<td>11.5%</td>
</tr>
<tr>
<td>Aerodactyl</td>
<td>33</td>
<td>47</td>
<td>9.1%</td>
<td>12.9%</td>
</tr>
<tr>
<td>Snorlax</td>
<td>35</td>
<td>48</td>
<td>6.7%</td>
<td>9.2%</td>
</tr>
<tr>
<td>Articuno</td>
<td>21</td>
<td>32</td>
<td>5.5%</td>
<td>8.4%</td>
</tr>
<tr>
<td>Zapdos</td>
<td>25</td>
<td>36</td>
<td>6.5%</td>
<td>9.4%</td>
</tr>
<tr>
<td>Moltres</td>
<td>27</td>
<td>38</td>
<td>7.0%</td>
<td>9.9%</td>
</tr>
<tr>
<td>Dratini</td>
<td>26</td>
<td>42</td>
<td>9.1%</td>
<td>14.7%</td>
</tr>
<tr>
<td>Dragonair</td>
<td>27</td>
<td>41</td>
<td>8.3%</td>
<td>12.6%</td>
</tr>
<tr>
<td>Dragonite</td>
<td>34</td>
<td>44</td>
<td>8.8%</td>
<td>11.4%</td>
</tr>
<tr>
<td>Mewtwo</td>
<td>29</td>
<td>40</td>
<td>7.0%</td>
<td>9.6%</td>
</tr>
<tr>
<td>Mew</td>
<td>25</td>
<td>35</td>
<td>6.2%</td>
<td>8.7%</td>
</tr>
</table>
<p><a href="#confusion-table">Back to top of table!</a></p>
</div>
<h3 id="status">Paralysis, Burn, and Poison</h3>
<p>Unlike in later generations, paralysis lowers Speed by 75% and burns directly halve Attack. Bad poison inflicted by Toxic is a secondary status that gradually increases residual damage and will be removed if the afflicted switches out, replacing it with normal poison and resetting the counter. If the afflicted KOes a Pok&eacute;mon, however, residual damage does not apply.</p>
<p>All status-based damage&mdash;poison, burns, and Leech Seed&mdash;uses a counter that begins at T/16, where T is the number of turns that have passed since bad poison began. From here on out, we will call this the "Toxic counter." This counter stays at 1 if it hasn't been put into effect. Therefore, all status-based residual damage begins at 6.25% and will not change unless Toxic has connected with a Pok&eacute;mon. If Toxic is in effect, T will increase every turn. However, due to Leech Seed sharing the Toxic counter, being afflicted with both Leech Seed and Toxic will effectively double the counter every turn and KO a Pok&eacute;mon in just 5 turns. Rest will not reset the counter, and if a Pok&eacute;mon is burned after Rest removes bad poison, this will cause a "badly burned" effect, causing the Toxic counter to compound burn damage as if it were poison. Haze will reset the Toxic counter upon use.</p>
<h3 id="turn-end">Turn End Mechanics</h3>
<p>If a Pok&eacute;mon faints, the turn ends there and then. Therefore, any end-of-turn effects&mdash;such as Hyper Beam forcing a recharge turn or a Pok&eacute;mon sustaining residual damage&mdash;are skipped.</p>
<h3 id="multi-hit">Multi-hit Damage Calculation</h3>
<p>All "multi-hits" will deal the same amount of damage, unaffected by any damage variance. This counts for the hits of typical multi-hit moves like Fury Attack as well as the hits of partial trapping moves like Wrap&mdash;which are "attacks" that depend on the user's stats and not set percentage damage like in later generations. Thus, if a critical hit connects, all the multi-hits will effectively critically hit. If a multi-hit move has a status effect, it will apply strictly on the last hit. Ergo, only Twineedle's last hit has a chance to inflict poison.</p>
<h3 id="partial-trapping">Partial Trapping</h3>
<p>RBY partial trapping should be treated like a completely separate entity to modern-day partial trapping. Partial trapping moves&mdash;Wrap, Bind, Clamp, and Fire Spin&mdash;will deal the same amount of damage every turn, similar to multi-hit moves. Additionally, a user will be locked into the move for 2-5 turns, and a target will be completely immobilized during the ordeal, unable to strike back. In the event of a Pok&eacute;mon with an immunity, such as Ghost-types against Wrap or Bind, they will be immobilized but will not take damage.</p>
<p>If the trapper switches, the trapped Pok&eacute;mon will not be able to move, making moves like Wrap pseudo-pivot moves. On the flip side, a faster trapped Pok&eacute;mon will get to punish the switch-in, as it will be freed the following turn. The trapped Pok&eacute;mon can also switch out, regardless of Speed. Switching out while trapped will force the opposing trapper to "reuse" the move, restarting the 2-5 turn lock and subtracting one PP, giving a form of PP stall counterplay. If the move is forced to be reused through switching at 0 PP though, it will roll over to 63 (this will not occur if the opponent tries to use the move at 0 PP). With these factors considered, there is quite a bit of depth to partial trapping situations.</p>
<img src="//play.pokemonshowdown.com/sprites/gen1rb/dragonite.png" alt="Dragonite" class="left" />
<p>If a Pok&eacute;mon has used Hyper Beam and the opposing partial trapping user misses, the recharge turn is skipped. If the partial trapping move is used and misses before the erstwhile recharging, though, the opposing Hyper Beam user will automatically reuse Hyper Beam. If they have 0 Hyper Beam PP at this point, the move's PP will also roll over to 63. For example, if Tauros uses its last Hyper Beam and fails to KO a normal Speed Dragonite, then Dragonite uses Wrap and misses, Tauros can immediately move again next turn. If Dragonite uses Agility right after the final Hyper Beam and then uses Wrap next turn and misses, however, Tauros will immediately use Hyper Beam and get 63 more uses.</p>
<p>If a partial trapping move is copied by Mirror Move and succeeds, it works as normal. However, if the trapped Pok&eacute;mon switches out in a Link Battle, due to Mirror Move forcing the move to fail on one side and having the user continue partial trapping on the other, this will cause a desync.</p>
<h3 id="accuracy-effect">1/256 Accuracy and Effect Chance</h3>
<p>No move in the chromatic generation is guaranteed to hit, except Bide and Swift, which skip accuracy checks, even against flying or underground foes. Every other move has an inherent 1/256 (~0.4%) chance to miss as a result of accuracy being checked between 0 and 256, with normal accuracy capped at 255. Only moves that target the opponent are subject to this.</p>
<p>Considering this uncertainty, it is possible to create a conversion table to show the true accuracy of a move.</p>
<table class="rby-table nobreak">
<tr>
<th>Stated Accuracy</th>
<th>True Accuracy</th>
<th>True Accuracy as a Percentage*</th>
<th>Notable Move(s)</th>
</tr>
<tr>
<td>100%</td>
<td>255/256</td>
<td>99.6%</td>
<td>Many!</td>
</tr>
<tr>
<td>95%</td>
<td>242/256</td>
<td>94.5%</td>
<td>Razor Leaf</td>
</tr>
<tr>
<td>90%</td>
<td>229/256</td>
<td>89.5%</td>
<td>Hyper Beam, Blizzard, Rock Slide</td>
</tr>
<tr>
<td>85%</td>
<td>216/256</td>
<td>84.4%</td>
<td>Fire Blast, Wrap, Toxic, Crabhammer, Pin Missile</td>
</tr>
<tr>
<td>80%</td>
<td>204/256</td>
<td>79.7%</td>
<td>Hydro Pump, Submission</td>
</tr>
<tr>
<td>75%</td>
<td>191/256</td>
<td>74.6%</td>
<td>Clamp, Lovely Kiss, Stun Spore, Bind</td>
</tr>
<tr>
<td>70%</td>
<td>178/256</td>
<td>69.5%</td>
<td>Fire Spin, Thunder</td>
</tr>
<tr>
<td>60%</td>
<td>153/256</td>
<td>59.8%</td>
<td>Hypnosis</td>
</tr>
<tr>
<td>55%</td>
<td>140/256</td>
<td>54.7%</td>
<td>Sing, Supersonic</td>
</tr>
<tr>
<td>30%</td>
<td>76/256</td>
<td>29.7%</td>
<td>Fissure, Horn Drill</td>
</tr>
</table>
<p><em>*Rounded to the nearest tenth</em></p>
<p>Effect chance also suffers from a similar but inverted uncertainty; this inversion is due to the way the probability is hardcoded. This uncertainty can effectively increase the chance of a secondary effect occurring from an attack beyond the stated chance. For example, Fissure will connect 76/256 times, whereas Body Slam will paralyze a foe 77/256 times.</p>
<table class="rby-table nobreak">
<tr>
<th>Stated Probability</th>
<th>True Probability</th>
<th>True Probability as a Percentage*</th>
<th>Examples</th>
</tr>
<tr>
<td>40%</td>
<td>103/256</td>
<td>40.2%</td>
<td>The chance that Sludge poisons the target.</td>
</tr>
<tr>
<td>33%</td>
<td>85/256</td>
<td>33.2%</td>
<td>The chance that Psychic drops the targets Special stat.</td>
</tr>
<tr>
<td>30%</td>
<td>77/256</td>
<td>30.1%</td>
<td>The chance that Body Slam paralyzes its target</td>
</tr>
<tr>
<td>20%</td>
<td>52/256</td>
<td>20.3%</td>
<td>The chance that Twineedle will poison its target.</td>
</tr>
<tr>
<td>10%</td>
<td>26/256</td>
<td>10.2%</td>
<td>The chance that Ice Beam will freeze its target.</td>
</tr>
</table>
<p><em>*Rounded to the nearest tenth</em></p>
<h3 id="recovery-fail">Recovery Move Failure</h3>
<p>If a Pok&eacute;mon's max HP and current HP have a difference of either 255 or 511, recovery moves will fail due to only checking the second byte of the user's current HP.</p>
<img src="//play.pokemonshowdown.com/sprites/gen1/chansey.png" alt="Chansey" />
<p>Let's look at this in more detail. RBY logically makes recovery moves fail if the Pok&eacute;mon is already at full HP, or specifically if Max HP - Current HP = 0, which also means that Rest cannot be used to cure status at full HP. This failure condition seems simple, but because the game only sees the second byte of current HP, things go awry when your HP is over 255, as 255 is the maximum amount that can be stored in a byte. In the event of an overflow, a carry flag is set to take 1 when calculating whether the recovery move should fail...to detrimental effect, as this leaves the second byte with 0 if you have 255 or 511 less than max HP. Let's use this example with Chansey, a notorious user of a recovery move in Soft-Boiled, after losing 511 HP. Due to only checking one byte in this scenario, Chansey's max HP in the game's eyes is 191. So when taking away the current HP and the 1 from the carry flag, if it's 192, in the game's eyes, Chansey's HP will be treated as if it were the maximum amount. Thus, the recovery move fails. Due to not having enough HP to even get above 255, Abra, Diglett, Magnemite, and Magikarp are unaffected by this glitch entirely.</p>
<p>Here is a table showing each Pok&eacute;mon's "failure number." Chansey and Snorlax are the only Pok&eacute;mon capable of reaching the HP required for the 511 number to be reached and have been omitted from the table itself.</p>
<p>511 for Chansey: 192 HP / 27.3%</p>
<p>511 for Snorlax: 12 HP / 2.3%</p>
<input type="button" value="Click to toggle table!" data-show-target="hp" id="hp-table" />
<div class="big-table" data-target="hp">
<table class="rby-table" style="max-width: 300px;">
<tr>
<th>Pok&eacute;mon</th>
<th>HP - 255</th>
<th>HP - 255 as %</th>
</tr>
<tr>
<td>Bulbasaur</td>
<td>38</td>
<td>13.0%</td>
</tr>
<tr>
<td>Ivysaur</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Venusaur</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Charmander</td>
<td>26</td>
<td>9.3%</td>
</tr>
<tr>
<td>Charmeleon</td>
<td>64</td>
<td>20.1%</td>
</tr>
<tr>
<td>Charizard</td>
<td>104</td>
<td>29.0%</td>
</tr>
<tr>
<td>Squirtle</td>
<td>36</td>
<td>12.4%</td>
</tr>
<tr>
<td>Wartortle</td>
<td>66</td>
<td>20.6%</td>
</tr>
<tr>
<td>Blastoise</td>
<td>106</td>
<td>29.4%</td>
</tr>
<tr>
<td>Caterpie</td>
<td>38</td>
<td>13.0%</td>
</tr>
<tr>
<td>Metapod</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Butterfree</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Weedle</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Kakuna</td>
<td>38</td>
<td>13.0%</td>
</tr>
<tr>
<td>Beedrill</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Pidgey</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Pidgeotto</td>
<td>74</td>
<td>22.5%</td>
</tr>
<tr>
<td>Pidgeot</td>
<td>114</td>
<td>30.9%</td>
</tr>
<tr>
<td>Rattata</td>
<td>8</td>
<td>3.0%</td>
</tr>
<tr>
<td>Raticate</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Spearow</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Fearow</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Ekans</td>
<td>18</td>
<td>6.6%</td>
</tr>
<tr>
<td>Arbok</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Pikachu</td>
<td>18</td>
<td>6.6%</td>
</tr>
<tr>
<td>Raichu</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Sandshrew</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Sandslash</td>
<td>98</td>
<td>27.8%</td>
</tr>
<tr>
<td>Nidoran-F</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Nidorina</td>
<td>88</td>
<td>25.7%</td>
</tr>
<tr>
<td>Nidoqueen</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Nidoran-M</td>
<td>40</td>
<td>13.6%</td>
</tr>
<tr>
<td>Nidorino</td>
<td>70</td>
<td>21.5%</td>
</tr>
<tr>
<td>Nidoking</td>
<td>110</td>
<td>30.1%</td>
</tr>
<tr>
<td>Clefairy</td>
<td>88</td>
<td>25.7%</td>
</tr>
<tr>
<td>Clefable</td>
<td>138</td>
<td>35.1%</td>
</tr>
<tr>
<td>Vulpix</td>
<td>24</td>
<td>8.6%</td>
</tr>
<tr>
<td>Ninetales</td>
<td>94</td>
<td>26.9%</td>
</tr>
<tr>
<td>Jigglypuff</td>
<td>178</td>
<td>41.1%</td>
</tr>
<tr>
<td>Wigglytuff</td>
<td>228</td>
<td>47.2%</td>
</tr>
<tr>
<td>Zubat</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Golbat</td>
<td>98</td>
<td>27.8%</td>
</tr>
<tr>
<td>Oddish</td>
<td>38</td>
<td>13.%</td>
</tr>
<tr>
<td>Gloom</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Vileplume</td>
<td>98</td>
<td>27.8%</td>
</tr>
<tr>
<td>Paras</td>
<td>18</td>
<td>6.6%</td>
</tr>
<tr>
<td>Parasect</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Venonat</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Venomoth</td>
<td>88</td>
<td>25.7%</td>
</tr>
<tr>
<td>Diglett</td>
<td>-32</td>
<td></td>
</tr>
<tr>
<td>Dugtrio</td>
<td>18</td>
<td>6.6%</td>
</tr>
<tr>
<td>Meowth</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Persian</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Psyduck</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Golduck</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Mankey</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Primeape</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Growlithe</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Arcanine</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Poliwag</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Poliwhirl</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Poliwrath</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Abra</td>
<td>-2</td>
<td></td>
</tr>
<tr>
<td>Kadabra</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Alakazam</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Machop</td>
<td>88</td>
<td>25.7%</td>
</tr>
<tr>
<td>Machoke</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Machamp</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Bellsprout</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Weepinbell</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Victreebel</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Tentacool</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Tentacruel</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Geodude</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Graveler</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Golem</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Ponyta</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Rapidash</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Slowpoke</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Slowbro</td>
<td>138</td>
<td>35.1%</td>
</tr>
<tr>
<td>Magnemite</td>
<td>-2</td>
<td></td>
</tr>
<tr>
<td>Magneton</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Farfetch'd</td>
<td>52</td>
<td>16.9%</td>
</tr>
<tr>
<td>Doduo</td>
<td>18</td>
<td>6.6%</td>
</tr>
<tr>
<td>Dodrio</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Seel</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Dewgong</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Grimer</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Muk</td>
<td>158</td>
<td>38.3%</td>
</tr>
<tr>
<td>Shellder</td>
<td>8</td>
<td>3.0%</td>
</tr>
<tr>
<td>Cloyster</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Gastly</td>
<td>8</td>
<td>3.0%</td>
</tr>
<tr>
<td>Haunter</td>
<td>38</td>
<td>13.0%</td>
</tr>
<tr>
<td>Gengar</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Onix</td>
<td>18</td>
<td>6.6%</td>
</tr>
<tr>
<td>Drowzee</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Hypno</td>
<td>118</td>
<td>31.6%</td>
</tr>
<tr>
<td>Krabby</td>
<td>8</td>
<td>3.0%</td>
</tr>
<tr>
<td>Kingler</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Voltorb</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Electrode</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Exeggcute</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Exeggutor</td>
<td>138</td>
<td>35.1%</td>
</tr>
<tr>
<td>Cubone</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Marowak</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Hitmonlee</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Hitmonchan</td>
<td>48</td>
<td>15.8%</td>
</tr>
<tr>
<td>Lickitung</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Koffing</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Weezing</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Rhyhorn</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Rhydon</td>
<td>158</td>
<td>38.3%</td>
</tr>
<tr>
<td>Chansey</td>
<td>448</td>
<td>63.7%</td>
</tr>
<tr>
<td>Tangela</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Kangaskhan</td>
<td>158</td>
<td>38.3%</td>
</tr>
<tr>
<td>Horsea</td>
<td>8</td>
<td>3.0%</td>
</tr>
<tr>
<td>Seadra</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Goldeen</td>
<td>38</td>
<td>13.0%</td>
</tr>
<tr>
<td>Seaking</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Staryu</td>
<td>8</td>
<td>3.0%</td>
</tr>
<tr>
<td>Starmie</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Mr. Mime</td>
<td>28</td>
<td>9.9%</td>
</tr>
<tr>
<td>Scyther</td>
<td>88</td>
<td>25.7%</td>
</tr>
<tr>
<td>Jynx</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Electabuzz</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Magmar</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Pinsir</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Tauros</td>
<td>98</td>
<td>27.8%</td>
</tr>
<tr>
<td>Magikarp</td>
<td>-12</td>
<td></td>
</tr>
<tr>
<td>Gyarados</td>
<td>138</td>
<td>35.1%</td>
</tr>
<tr>
<td>Lapras</td>
<td>208</td>
<td>44.9%</td>
</tr>
<tr>
<td>Ditto</td>
<td>44</td>
<td>14.7%</td>
</tr>
<tr>
<td>Eevee</td>
<td>58</td>
<td>18.5%</td>
</tr>
<tr>
<td>Vaporeon</td>
<td>208</td>
<td>44.9%</td>
</tr>
<tr>
<td>Jolteon</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Flareon</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Porygon</td>
<td>78</td>
<td>23.4%</td>
</tr>
<tr>
<td>Omanyte</td>
<td>18</td>
<td>6.6%</td>
</tr>
<tr>
<td>Omastar</td>
<td>88</td>
<td>25.7%</td>
</tr>
<tr>
<td>Kabuto</td>
<td>8</td>
<td>3.0%</td>
</tr>
<tr>
<td>Kabutops</td>
<td>68</td>
<td>21.1%</td>
</tr>
<tr>
<td>Aerodactyl</td>
<td>108</td>
<td>29.8%</td>
</tr>
<tr>
<td>Snorlax</td>
<td>268</td>
<td>51.2%</td>
</tr>
<tr>
<td>Articuno</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Zapdos</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Moltres</td>
<td>128</td>
<td>33.4%</td>
</tr>
<tr>
<td>Dratini</td>
<td>30</td>
<td>10.5%</td>
</tr>
<tr>
<td>Dragonair</td>
<td>70</td>
<td>21.5%</td>
</tr>
<tr>
<td>Dragonite</td>
<td>130</td>
<td>33.8%</td>
</tr>
<tr>
<td>Mewtwo</td>
<td>160</td>
<td>38.6%</td>
</tr>
<tr>
<td>Mew</td>
<td>148</td>
<td>36.7%</td>
</tr>
</table>
<p><a href="#hp-table">Back to top of table!</a></p>
</div>
<h3 id="damage-storing">Damage Storing Mechanics</h3>
<p>RBY stores the last damage that was dished out by either Pok&eacute;mon. This is for Bide and Counter's use, which will cite it when necessary.</p>
<p>Most status moves will reset the damage last dealt; however, some moves don't. Moves that don't include: Confuse Ray, Conversion, Focus Energy, Glare, Haze, Leech Seed, Light Screen, Mimic, Mist, Poison Gas, Poison Powder, Recover, Reflect, Rest, Soft-Boiled, Splash, Stun Spore, Substitute, Supersonic, Teleport, Thunder Wave, Toxic, and Transform. This can lead to some unintended results, such as Bide stacking the damage that was dealt the previous turn.</p>
<p><a href="#toc">Back to table of contents!</a></p>
<hr />
<h2>Part 2: Move Mechanics</h2>
<p>With every passing generation, moves in Pok&eacute;mon will receive revisions. RBY is the earliest generation, and as such, many moves have significant differences to the present day. Here, we will compile all the notable differences. Knowing these mechanics is pivotal to playing the game and teambuilding effectively.</p>
<p>As a general rule, moves that have the same stated accuracy as present generations will not be noted, despite the 1/256 uncertainty technically making them different. In addition, there are numerous moves that have only received Base Power, stated Accuracy, or PP changes, which will not be noted either. If a move has major mechanics changes, however, these differences will be noted for completion's sake.</p>
<h3 id="acid">Acid, Aurora Beam, Bubble, Bubble Beam, and Constrict</h3>
<p>These moves all have a 33.2% chance of their effects occurring.</p>
<h3 id="bide">Bide</h3>
<p>The Bide user is locked into charging for 2-3 turns before attacking, dealing double the total damage it received. This ignores accuracy checks and type immunity, and even hits when the foe is semi-invulnerable during Fly or Dig. Bide isn't entirely committal either; the user can switch out during the move if the situation becomes unfavorable. If confusion or paralysis interrupts Bide, the effect ends. Sleep, freeze, flinching, and partial trapping will pause&mdash;but don't stop&mdash;Bide.</p>
<p>There are ways that Bide's damage can be stacked. If the foe switches out, the last damage dealt to the user will be re-added to the total. Ergo, if a Pok&eacute;mon attacks with Thunderbolt and switches to something else, it will be as if Thunderbolt hit the Bide user twice. Additionally, some moves will also compound Bide's damage due to not clearing the last damage dealt that turn. These include: Confuse Ray, Conversion, Focus Energy, Glare, Haze, Leech Seed, Light Screen, Mimic, Mist, Poison Gas, Poison Powder, Recover, Reflect, Rest, Soft-Boiled, Splash, Stun Spore, Substitute, Supersonic, Teleport, Thunder Wave, Toxic, and Transform.</p>
<p>If a foe is using Bide and your Pok&eacute;mon faints before the user "unleashes energy," possible through residual damage such as Toxic poison or recoil, the damage stored by Bide is supposed to be cleared. However, specifically for the side that took residual damage, only the most significant byte of the Bide damage is cleared, which means that the Bide damage stored may still be any value up to 255. This disparity typically causes no PRNG differences, but if a Pok&eacute;mon faints due to the damage difference from Bide, a desync will occur.</p>
<h3 id="bind">Bind</h3>
<p>In addition to partial trapping mechanic differences, Bind has 74.6% accuracy.</p>
<h3 id="bite">Bite</h3>
<p>The Dark-type does not exist, so Bite is Normal-type. It also only has a 10% chance to flinch, down from 30%.</p>
<h3 id="conversion">Conversion</h3>
<p>Conversion changes the user's type to match the foe's, both primary and secondary, making it effectively the same move as Reflect Type in later games. It doesn't clear the last damage dealt, so it will allow Bide damage to stack.</p>
<h3 id="counter">Counter</h3>
<p>Counter is fairly notorious for its complicated mechanics, but it isn't as bad as it seems in context. If a Pok&eacute;mon was last hit by a Normal- or Fighting-type move and the last move's Base Power is more than 0, Counter activates, dealing double the damage dealt last. Counter has a Base Power of 1, unlike in later generations where it's not specified. Counter also ignores type immunity, so it can hit Ghost-types like Gengar.</p>
<img src="//play.pokemonshowdown.com/sprites/gen1/snorlax.png" alt="Snorlax" class="left" />
<p>Counter does have some odd interactions due to how damage is stored in the game. Since damage isn't cleared upon a Pok&eacute;mon switching out, Counter can work against Normal- and Fighting-type moves that dealt damage the previous turn. If Snorlax uses Body Slam on a faster Pok&eacute;mon and immediately switches out, if the foe uses Counter, it will counter the Body Slam from the previous turn. This also applies to things like Hyper Beam, where a Pok&eacute;mon can switch in, take the hit, and counter the move the following turn while the foe recharges. This is because recharging doesn't clear the last damage dealt. For an even more comical example, it is possible to counter an Explosion if a Pok&eacute;mon switches out the turn after, dealing massive damage and often getting a free KO. This can even be applied to recoil or crash damage!</p>
<h3 id="dig-fly">Dig and Fly</h3>
<p>Both Dig and Fly are affected by the semi-invulnerability glitch, a quirk so powerful that the moves are banned in almost all competitive RBY formats. It causes users to be affected by semi-invulnerability if the moves are interrupted mid-use until Fly or Dig are used successfully; this means confusion and paralysis can inadvertently cause the glitch to occur. Only Swift and Bide can hit a Pok&eacute;mon during semi-invulnerability in RBY, making these moves the only real counterplay.</p>
<h3 id="disable">Disable</h3>
<p>Disable has a paltry 54.7% accuracy and disables a random move in the foe's moveset for 0-7 turns. If Disable misses a Pok&eacute;mon under the effect of Rage, it will cause the opposing Rage user's Attack to increase.</p>
<h3 id="dizzy-punch">Dizzy Punch</h3>
<p>Dizzy Punch has no added effect.</p>
<h3 id="double-edge">Double-Edge</h3>
<p>Double-Edge has 100 Base Power and only inflicts 1/4 of the damage dealt as recoil.</p>
<h3 id="earthquake">Earthquake</h3>
<p>Earthquake does not hit Pok&eacute;mon during Dig.</p>
<h3 id="explosion-selfdestruct">Explosion and Self-Destruct</h3>
<p>Explosion has 170 Base Power and Self-Destruct has 130. They halve the foe's Defense during damage calculation, making their Base Powers effectively 340 and 260, respectively. Users of Explosion and Self-Destruct will not faint if using either against a Substitute. Due to the turn ending mechanics, these moves provide free switch-ins to your Pok&eacute;mon after use, as the foe will not be able to move if they survived the attack.</p>
<h3 id="fire-blast">Fire Blast</h3>
<p>Fire Blast has a 30% chance to burn!</p>
<h3 id="ohko-moves">Fissure, Guillotine, and Horn Drill</h3>
<p>These moves deal 65535 damage as fixed damage-type moves. In addition, they only work on foes slower than the user. Using a Speed-boosting move such as Agility will allow Pok&eacute;mon like Seaking to be capable of OHKOing any Pok&eacute;mon.</p>
<h3 id="glare">Glare</h3>
<img src="//play.pokemonshowdown.com/sprites/gen1rb/arbok.png" alt="Arbok" style="margin-top: -3.5em;" />
<p>Glare has 74.6% accuracy and can affect Ghost-types, unlike in GSC and ADV.</p>
<h3 id="gust">Gust</h3>
<p>Gust is Normal-type and does not connect against foes using Fly.</p>
<h3 id="haze">Haze</h3>
<img src="//play.pokemonshowdown.com/sprites/gen1rb/vaporeon.png" alt="Vaporeon" class="left"/>
<p>Haze is a very odd move. It will remove any and all volatile changes to both Pok&eacute;mon; this includes setting stat changes to 0, removing stat reductions caused by status conditions, and secondary status. Essentially, it is a full reset to the conditions for both Pok&eacute;mon. It will also turn bad poison inflicted by Toxic into normal poison and reset the Toxic counter.</p>
<p>A significant issue to note is that Haze will remove the major status condition for the foe only, even though it removes stat reductions from statuses for both. This means that it will remove paralysis, burn, poison, sleep, or freeze if the foe is inflicted with it. Due to this, it's possible to exploit Haze users by switching in a Pok&eacute;mon crippled by status. This makes the move a rare sight in competitive play, though its distribution can also be considered a deciding factor.</p>
<p>If Haze is used against a Pok&eacute;mon that has been put to sleep or frozen during Rage, Bide, thrashing about moves, or a move's charge turn, the victim will become permanently immobilized. This also happens to Hyper Beam users while recharging, but only if they're frozen.</p>
<p>Overall, Haze will remove:</p>
<ul class="list">
<li>All stat buffs and debuffs</li>
<li>Major status condition (foe only) and the stat reduction from burn and/or paralysis (both Pok&eacute;mon)</li>
<li>Confusion</li>
<li>Leech Seed</li>
<li>Reflect</li>
<li>Light Screen</li>
<li>Mist</li>
<li>Disable</li>
<li>Bad poison (changes to normal poison)</li>
</ul>
<h3 id="hjk-jump-kick">High Jump Kick and Jump Kick</h3>
<p>High Jump Kick and Jump Kick have 85 and 70 Base Power, respectively. Jump Kick also has 25 PP. Curiously, if the moves fail to connect, the user only takes 1 HP of crash damage. This residual damage can be countered by Counter.</p>
<h3 id="hyper-beam">Hyper Beam</h3>
<p>Hyper Beam is extremely powerful, with the recharge turn being skipped if a Substitute or opposing Pok&eacute;mon is KOed. This makes it a common sight.</p>
<h3 id="karate-chop">Karate Chop</h3>
<p>Karate Chop is Normal-type rather than Fighting-type.</p>
<h3 id="leech-seed">Leech Seed</h3>
<p>Leech Seed absorbs 6.25% of the foe's HP, rounded down but not less than 1. This can be increased through Toxic; refer to the status section for more information. Even if a Pok&eacute;mon is KOed by other residual damage&mdash;such as confusion or recoil&mdash;the health draining from Leech Seed will still occur. However, if Leech Seed itself KOes the target, health will not be recovered due to turn ending mechanics. Additionally, damage dealt by Leech Seed is done after any other residual damage, such as Wrap, poison, and burn. If a Pok&eacute;mon is hit by Leech Seed switching in, they will have their HP drained that turn, but only if their Speed is less than or equal to the Leech Seed user's.</p>
<p>Like later generations, Grass-types are not affected by Leech Seed and the seeded status is removed through switching out. However, Haze can also remove it.</p>
<h3 id="low-kick">Low Kick</h3>
<p>Low Kick is a 50 Base Power move with 89.5% accuracy and a 30.1% chance to flinch.</p>
<h3 id="mimic">Mimic</h3>
<p>Mimic will randomly copy a foe's move with no restrictions attached. Even if your Pok&eacute;mon already has the same move, Mimic can still potentially copy it. This copied move will have the same maximum and current PP of Mimic.</p>
<h3 id="minimize">Minimize</h3>
<p>Minimize raises evasion by one stage, making it virtually identical to Double Team. It also has 20 PP, which does make it a strict upgrade.</p>
<h3 id="mirror-move">Mirror Move</h3>
<p>Mirror Move interacts oddly with multi-turn moves, ignoring them as they charge. This means that if a Pok&eacute;mon uses Body Slam and then Solar Beam, Mirror Move will copy Body Slam on the charge turn. Similar situations occur with paralysis, freezing, flinching, confusion, and recharging from Hyper Beam. If the foe switches out, Mirror Move will fail, which is part of what causes the desync mentioned in the partial trapping section.</p>
<h3 id="night-shade-seismic-toss">Night Shade and Seismic Toss</h3>
<p>Due to set damage mechanics, Night Shade and Seismic Toss will hit Normal- and Ghost-types, respectively.</p>
<h3 id="poison-sting">Poison Sting</h3>
<p>Poison Sting has a 19.9% chance to inflict poison.</p>
<h3 id="psychic">Psychic</h3>
<p>Psychic has a 33.2% chance to drop Special by one stage.</p>
<h3 id="psywave">Psywave</h3>
<p>Psywave is quite odd. Psywave deals damage between 1 and 1.5x the user's level, which at Level 100 will deal up to 150 damage. It also has a 79.7% chance to connect, unlike newer generations.</p>
<p>In a Link Battle, Psywave will have a lower bound of dealing 0 damage on one side, meaning that there is an inherent chance the game will desync, increasing as the level lowers. At Level 100, this is a 0.662% chance. The lowest possible level to use Psywave at is Level 3 with Jigglypuff, which has a 20% chance to desync the game. The game will also crash if Psywave is used by a Level 0, 1, or 171 Pok&eacute;mon, though none of these can be achieved without hacking.</p>
<p>Here is a table featuring Psywave desync chances by level:</p>
<input type="button" value="Click to toggle table!" data-show-target="desync" id="desync-table" />
<div class="big-table" data-target="desync">
<table class="rby-table" style="max-width: 200px;">
<tr>
<th>Level</th>
<th>Desync Chance</th>
</tr>
<tr>
<td>2</td>
<td>25.000%</td>
</tr>
<tr>
<td>3</td>
<td>20.000%</td>
</tr>
<tr>
<td>4</td>
<td>14.286%</td>
</tr>
<tr>
<td>5</td>
<td>12.500%</td>
</tr>
<tr>
<td>6</td>
<td>10.000%</td>
</tr>
<tr>
<td>7</td>
<td>9.091%</td>
</tr>
<tr>
<td>8</td>
<td>7.692%</td>
</tr>
<tr>
<td>9</td>
<td>7.143%</td>
</tr>
<tr>
<td>10</td>
<td>6.250%</td>
</tr>
<tr>
<td>11</td>
<td>5.882%</td>
</tr>
<tr>
<td>12</td>
<td>5.263%</td>
</tr>
<tr>
<td>13</td>
<td>5.000%</td>
</tr>
<tr>
<td>14</td>
<td>4.545%</td>
</tr>
<tr>
<td>15</td>
<td>4.348%</td>
</tr>
<tr>
<td>16</td>
<td>4.000%</td>
</tr>
<tr>
<td>17</td>
<td>3.846%</td>
</tr>
<tr>
<td>18</td>
<td>3.571%</td>
</tr>
<tr>
<td>19</td>
<td>3.448%</td>
</tr>
<tr>
<td>20</td>
<td>3.226%</td>
</tr>
<tr>
<td>21</td>
<td>3.125%</td>
</tr>
<tr>
<td>22</td>
<td>2.941%</td>
</tr>
<tr>
<td>23</td>
<td>2.857%</td>
</tr>
<tr>
<td>24</td>
<td>2.703%</td>
</tr>
<tr>
<td>25</td>
<td>2.632%</td>
</tr>
<tr>
<td>26</td>
<td>2.500%</td>
</tr>
<tr>
<td>27</td>
<td>2.439%</td>
</tr>
<tr>
<td>28</td>
<td>2.326%</td>
</tr>
<tr>
<td>29</td>
<td>2.273%</td>
</tr>
<tr>
<td>30</td>
<td>2.174%</td>
</tr>
<tr>
<td>31</td>
<td>2.128%</td>
</tr>
<tr>
<td>32</td>
<td>2.041%</td>
</tr>
<tr>
<td>33</td>
<td>2.000%</td>
</tr>
<tr>
<td>34</td>
<td>1.923%</td>
</tr>
<tr>
<td>35</td>
<td>1.887%</td>
</tr>
<tr>
<td>36</td>
<td>1.818%</td>
</tr>
<tr>
<td>37</td>
<td>1.786%</td>
</tr>
<tr>
<td>38</td>
<td>1.724%</td>
</tr>
<tr>
<td>39</td>
<td>1.695%</td>
</tr>
<tr>
<td>40</td>
<td>1.639%</td>
</tr>
<tr>
<td>41</td>
<td>1.613%</td>
</tr>
<tr>
<td>42</td>
<td>1.563%</td>
</tr>
<tr>
<td>43</td>
<td>1.538%</td>
</tr>
<tr>
<td>44</td>
<td>1.493%</td>
</tr>
<tr>
<td>45</td>
<td>1.471%</td>
</tr>
<tr>
<td>46</td>
<td>1.429%</td>
</tr>
<tr>
<td>47</td>
<td>1.408%</td>
</tr>
<tr>
<td>48</td>
<td>1.370%</td>
</tr>
<tr>
<td>49</td>
<td>1.351%</td>
</tr>
<tr>
<td>50</td>
<td>1.316%</td>
</tr>
<tr>
<td>51</td>
<td>1.299%</td>
</tr>
<tr>
<td>52</td>
<td>1.266%</td>
</tr>
<tr>
<td>53</td>
<td>1.250%</td>
</tr>
<tr>
<td>54</td>
<td>1.220%</td>
</tr>
<tr>
<td>55</td>
<td>1.205%</td>
</tr>
<tr>
<td>56</td>
<td>1.176%</td>
</tr>
<tr>
<td>57</td>
<td>1.163%</td>
</tr>
<tr>
<td>58</td>
<td>1.136%</td>
</tr>
<tr>
<td>59</td>
<td>1.124%</td>
</tr>
<tr>
<td>60</td>
<td>1.099%</td>
</tr>
<tr>
<td>61</td>
<td>1.087%</td>
</tr>
<tr>
<td>62</td>
<td>1.064%</td>
</tr>
<tr>
<td>63</td>
<td>1.053%</td>
</tr>
<tr>
<td>64</td>
<td>1.031%</td>
</tr>
<tr>
<td>65</td>
<td>1.020%</td>
</tr>
<tr>
<td>66</td>
<td>1.000%</td>
</tr>
<tr>
<td>67</td>
<td>0.990%</td>
</tr>
<tr>
<td>68</td>
<td>0.971%</td>
</tr>
<tr>
<td>69</td>
<td>0.962%</td>
</tr>
<tr>
<td>70</td>
<td>0.943%</td>
</tr>
<tr>
<td>71</td>
<td>0.935%</td>
</tr>
<tr>
<td>72</td>
<td>0.917%</td>
</tr>
<tr>
<td>73</td>
<td>0.909%</td>
</tr>
<tr>
<td>74</td>
<td>0.893%</td>
</tr>
<tr>
<td>75</td>
<td>0.885%</td>
</tr>
<tr>
<td>76</td>
<td>0.870%</td>
</tr>
<tr>
<td>77</td>
<td>0.862%</td>
</tr>
<tr>
<td>78</td>
<td>0.847%</td>
</tr>
<tr>
<td>79</td>
<td>0.840%</td>
</tr>
<tr>
<td>80</td>
<td>0.826%</td>
</tr>
<tr>
<td>81</td>
<td>0.820%</td>
</tr>
<tr>
<td>82</td>
<td>0.806%</td>
</tr>
<tr>
<td>83</td>
<td>0.800%</td>
</tr>
<tr>
<td>84</td>
<td>0.787%</td>
</tr>
<tr>
<td>85</td>
<td>0.781%</td>
</tr>
<tr>
<td>86</td>
<td>0.769%</td>
</tr>
<tr>
<td>87</td>
<td>0.763%</td>
</tr>
<tr>
<td>88</td>
<td>0.752%</td>
</tr>
<tr>
<td>89</td>
<td>0.746%</td>
</tr>
<tr>
<td>90</td>
<td>0.735%</td>
</tr>
<tr>
<td>91</td>
<td>0.730%</td>
</tr>
<tr>
<td>92</td>
<td>0.719%</td>
</tr>
<tr>
<td>93</td>
<td>0.714%</td>
</tr>
<tr>
<td>94</td>
<td>0.704%</td>
</tr>
<tr>
<td>95</td>
<td>0.699%</td>
</tr>
<tr>
<td>96</td>
<td>0.690%</td>
</tr>
<tr>
<td>97</td>
<td>0.685%</td>
</tr>
<tr>
<td>98</td>
<td>0.676%</td>
</tr>
<tr>
<td>99</td>
<td>0.671%</td>
</tr>
<tr>
<td>100</td>
<td>0.662%</td>
</tr>
</table>
<p><a href="#desync-table">Back to top of table!</a></p>
</div>
<h3 id="quick-attack">Quick Attack</h3>
<p>If a Pok&eacute;mon is put to sleep or frozen on the turn Quick Attack is attempted to be used, its increased priority persists until the (start of the or end of the?) turn after the user wakes up, is defrosted, or switches out.</p>
<h3 id="rage-petal-dance-thrash">Rage, Petal Dance, and Thrash</h3>
<p>Thrash is a 90 Base Power move with 20 PP and Petal Dance has 70 Base Power and 20 PP. "Thrashing about" will persist for 3-4 turns, and always confuses the user upon ending naturally, resetting confusion if it's already confused. If not ended naturally, such as through paralysis, confusion is not sustained. Sleep, freeze, flinching, and partial trapping will only pause Thrash, though. Confusion being sustained is not mentioned, and will only be discovered upon selecting a move.</p>
<p>Petal Dance and Thrash will recalculate accuracy values every turn using current accuracy, but not to more than 255/256 or less than 1/256. With accuracy debuffs or evasion buffs, this can lead to their accuracy progressively decreasing, even if the foe doesn't further alter accuracy or evasion during the move's duration. For example, if a Thrash user goes against a target that has increased its evasion, accuracy will be read as 168, or 65.8% considering the 1/256 uncertainty. However, the next turn, accuracy will scale to 112, or 43.9%. This can theoretically lead to it dropping to 1 accuracy, but due to the length of time thrashing about moves last, this is a very rare occurrence. For this same reason, in-context, this effect is almost unnoticeable.</p>
<p>Rage works a bit differently. If Rage misses while the "thrashing about" state is active as a result of lowered accuracy or foe evasion, its accuracy drops to 0.4%. If Disable misses during Rage, it will still raise Attack. Nothing will stop Rage once it starts: even being thawed from freezing will not change this. Rage will not increase Attack past +6 or the 999 stat cap.</p>
<h3 id="charge-moves">Razor Wind, Sky Attack, Skull Bash, and Solar Beam</h3>
<p>Razor Wind has 74.6% accuracy. Sky Attack has no additional effect upon use: no increased critical hit ratio or flinch chance. Skull Bash does not raise Defense upon use.</p>
<p>All of these moves will not count as the last move used until they actually execute, so if Mirror Move is used, it will fail if a move wasn't used prior; if a move was used, Mirror Move will copy that one. Partial trapping, sleep, freezing, and flinching will pause but not stop these moves.</p>
<h3 id="recover-soft-boiled">Recover and Soft-Boiled</h3>
<p>Recover notoriously has 20 PP, which, with a PP Max, becomes an eye-watering 32. Both moves are otherwise the same and are subject to the recovery failure glitch.</p>
<h3 id="screens-mist">Reflect, Light Screen, Mist</h3>
<p>Reflect and Light Screen are permanent upon use, acting sort of like Iron Defense or Amnesia. However, before you start chucking Light Screen on your Chansey, know that these effects only apply when receiving damage; Light Screen doesn't boost Special. Mist is also permanent, but it only stops moves that directly drop stats and not those with secondary effects. So, it'll block String Shot, but not Psychic Special drops.</p>
<h3 id="rest">Rest</h3>
<p>Rest is subject to the recovery failure glitch. Rest will not remove stat drops inflicted by paralysis or burn, nor will it reset the Toxic counter. The Rest user will wake up after 1 turn of sleeping, which, due to the waking up mechanics, makes it effectively the same as later generations.</p>
<h3 id="rock-slide">Rock Slide</h3>
<p>Rock Slide has no additional effect; as such, the flinch chance does not exist.</p>
<h3 id="roar-whirlwind">Roar and Whirlwind</h3>
<p>These moves have no in-battle effect: there is no phazing in RBY.</p>
<h3 id="sand-attack">Sand Attack</h3>
<p>Sand Attack is Normal-type.</p>
<h3 id="stomp">Stomp</h3>
<p>Stomp's damage is not doubled against Minimize.</p>
<h3 id="substitute">Substitute</h3>
<img src="//play.pokemonshowdown.com/sprites/gen1rg/rhydon.png" alt="Rhydon" />
<p>If your Pok&eacute;mon has exactly 25% of its HP and uses Substitute, the user will self-KO. Substitutes don't block major status, Disable, or confusion. Substitute does, however, prevent flinching. Substitute blocks poison, so Poison Powder, Toxic, and Poison Gas will fail against it, and moves with added poison effects will never apply them. Substitutes can fade if exactly 255 damage is dealt, even if that is less than the usual 25%. Confusion damage is dealt to opposing Substitutes if one is available. If a multi-hit attack breaks a Substitute, the multi-hit attack will end. Pok&eacute;mon that use Explosion or Self-Destruct will not faint against Substitute. Substitute does not make Counter fail while active, so if a Substitute is hit with a Normal- or Fighting-type move, Counter will still work and hit for the damage dealt.</p>
<h3 id="struggle">Struggle</h3>
<p>Struggle is considered Normal-type and will not affect Ghost-types, making infinite battles between Ghost-types possible. It will also deal 1/2 of the damage dealt as recoil and can critically hit. Struggle is subject to accuracy checks, so it can miss with accuracy drops and is affected by the 1/256 uncertainty.</p>
<h3 id="thunder">Thunder</h3>
<p>Thunder has 120 Base Power, has a 10% chance to inflict paralysis, and misses against foes using Fly.</p>
<h3 id="teleport">Teleport</h3>
<p>Teleport does nothing in-battle.</p>
<h3 id="toxic">Toxic</h3>
<p>Toxic has 84.4% accuracy and bad poison is treated as a kind of secondary status effect that is added to regular poison. For more information, view the residual damage section.</p>
<h3 id="transform">Transform</h3>
<p>Transform does not fail against any other Pok&eacute;mon, causing Ditto vs Ditto to be an infinite battle. The foe's status condition isn't copied, though Reflect and Light Screen will have their boosts applied to the user's new stats when it is hit by an attack. Since base Speed isn't copied, the Transform user's critical hit rate remains the same.</p>
<h3 id="tri-attack">Tri Attack</h3>
<p>Tri Attack has no additional effect, so it can't freeze, burn, or paralyze foes.</p>
<p style="margin-bottom: 1em;"><a href="#toc">Back to table of contents!</a></p>
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