Adding an extra button shows you own a Pokémon but isn't it home.

[LordKingPepega]

Maybe add a small button down the bottom left of each Pokémon that instead of turning the box yellow like normal it will turn it blue. I think this would be useful to keep track of Pokémon that I have in a game but just haven't put into home yet. Not that big of a deal but would be helpful to keep everything organized.