MarioMeteor
Smash Hero
Preferable ones that have heads proportionate to their bodies.Good Smile Company already has the Mario license. Mario is here, and Luigi is here.
My top two picks (K. Rool and Bandana Dee), one whose fans have fought long and hard, and one who was unjustly cut. I'd be happy with that result, myself.
EDIT: Well, that's a turn-up for the books. I just saw the strange CGI technique from the Kirby anime show up in the oddest place.