Pokemon Master. I can't think of anything better than capturing great wild animals from their natural habitats and making them live in tiny balls for the rest of their lives, only being let loose to fight other animals.
Beating Bowser's no big deal. I can beat him in Brawling, I can beat him at Karting, I can beat him at Golf. Heck, I'm probably beating him in literacy just by making this post.
So, Pokemon, y'all.