[Pokémon trainer, personal trainer, basically the same thing. Just for cute critters instead of humanoids.]

I'm a Pokémon trainer! It's a sport in my world. A little like fencing or martial arts, if Halcandra or Pop Star have those--people tame Pokémon and teach them how to fight, then they battle each other. Not only are you helping Pokémon bring out their full potential and strength, but you're also developing your own ability to read a situation and adapt quickly, not to mention working as a team.