Topkek

Hawlucha @ Power Herb  
Ability: Unburden  
Shiny: Yes  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Acrobatics  
- Sky Attack  
- High Jump Kick  
- Swords Dance  

Serperior @ Life Orb  
Ability: Contrary  
Shiny: Yes  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk / 30 SpA / 30 Spe  
- Leaf Storm  
- Synthesis  
- Dragon Pulse  
- Hidden Power [Fire]  

Rotom-Wash @ Choice Specs  
Ability: Levitate  
Shiny: Yes  
EVs: 248 HP / 252 SpA / 8 SpD  
Modest Nature  
IVs: 0 Atk  
- Will-O-Wisp  
- Hydro Pump  
- Thunderbolt  
- Volt Switch  

Gardevoir @ Life Orb  
Ability: Synchronize  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Hyper Voice  
- Psyshock  
- Moonblast  
- Dazzling Gleam  

Charizard-Mega-Y @ Charizardite Y  
Ability: Drought  
EVs: 248 HP / 252 SpA / 8 SpD  
Modest Nature  
IVs: 0 Atk  
- Solar Beam  
- Fire Blast  
- Focus Blast  
- Roost  

Dragonite @ Lum Berry  
Ability: Multiscale  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Outrage  
- Extreme Speed  
- Earthquake  
- Dragon Dance