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I'm unsure on acrobatics. I'm not a huge fan, but it encourages holding a sitrus berry, which encourages a belly drum set, so I'm not against it either
Wasn't the point of the Flying typing to exploit Acrobatics?
Edit: Drain Punch was the toughest call for me. Wouldn't mind seeing some movepool submissions where it's illegal with something else. I'll have to give this more thought.