While hilarious, Pokemon could fit that genre pretty smoothly. Lots of characters, 4 attacks each (let players customize of course), leveling up, hell you could evolve during the match maybe. Would be so cool.
I'd still love an 3d action rpg pokemon, when in battle you control the pokemons movement and A/B/X/Y are each mapped to a separate attack with individual cooldowns.
a man can dream
edit: Or, hell, you don't even need to control the actual pokemon, but maybe A/b/x/y makes you shout that move at your pokemon and he will run around and do his best to battle, following your commands.
GODDAMIT THERES SO MUCH POTENTIAL WHY DOESNT NINTENDO DO STUFF