>>29191724"Come up with a strategy!"
=
"Use these specific 'mons, level them up to this minimum level, give them this moveset, and spawm items"
If I have to use ANY specific pokemon to beat a trainer, instead of the ones I WANT to use, then the romhack has failed in my book. That's literally one of the main rules of the pokemon universe; any pokemon is viable.
Except for Magikarp, Feebas, and Dunsparce.