Shoutouts to SimpleFlips. This is adapted from my comment on his video here. It's mostly just not-running, but includes other things to make you slower.
You can copy and paste this (the raw Markdown) into YouTube verbatim. Please link here so people can copy it easier. If you do modify this, please fork for sharing improvements.
These are the rules I'd suggest:
Rules are applied in order. #2 overrides #1, #3 #2, and so on and so forth.
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The core principle: you can't hold the run button and move a significant distance unless it doesn't increase your speed while doing so or override behavior that affects movement in a significant way. This only applies after the in-game timer has started. Anything that violates this principle is considered "running" and thus banned.
This means a few things:
- Yoshi riding does count as running
- Quick-climbing vines also counts as running.
- Koopa cars are legal because holding run doesn't increase your speed
- You can hold Y/X while using a Clown Car and hovering (repeatedly tapping UP), as you're not travelling a significant distance
- You can hold Y/X while using a Clown Car and floating downwards (not touching buttons) as you're not overriding default behavior
- You can pick up other players as long as you don't move.
- Fireball shooting whole moving is legal because it's not a significant distance.
- Long jumping is legal.
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You MAY sprint ONLY to clear obstacles that cannot be beaten without interaction with another player. If you need another player to clear an obstacle because you need to run, go ahead and run.
- This rule is the most flexible one because it might be interesting to try to get people to throw you over. Realistically, however, players won't help you out.
Please append this at the end of your comment so people can find updated versions and others' forks easier:
Original at https://gist.github.com/nfitzen/451237f2f3b317ba4762921005da5d74.