I love Nintendo characters. Mario, Zelda, Metroid, Starfox, Kirby to a certain extent, Fire Emblem, Donkey Kong, Advance Wars, Pikmin, Animal Crossing.
I'm still waiting for Olimar, who belongs there, and I wish they'd use K.K. Slider or Tom Nook.
And if you're going to overuse a franchise, why not Mario? There are a ton of interesting Mario characters that would make a more interesting character than Pokemon Trainer, like the Koopas from Super Mario World and Super Mario Brothers 3, Petey Piranha, Mouser, Birdetta, etc.