I mean, custom games already allow lv 9999, all 252 EVs, pokestar pokes, Eternamax and all sorts of op abilities, moves and items, anything can happen, so I suggest the idea of being able to change the types of pokemon, so we can have, like, a dragon type milltank, a fire type espeon, or an fairy/flying absol etc.. I've seen many metagames where pokemon change their types at the start of the battle and I think it's super fun, so I suggest bring this into Custom games bc why not :p