Pokemon but except of fighting you need to make friends with pokemon to have them stay with you.
@clacke apparently he didn't did that for the owl one in the the alola series ... but yeah, that's really stupid :(
Pokemon is full of great stuff but there are really structural problems in it.
@bram but they enjoy fighting, that's how you make friends with them :x
(I think the Pokémon Rangers spin-off series doesn't feature direct fighting to get Pokémon on your team? Haven't played it)
@bram This is called "Digimon"
@lis don't know this one but it looks cool from a few videos '-'