Mario seeing as I still enjoy his games today (old and modern). Would've been Sonic but Sega seemed to have lost the ball 6 years ago and still haven't found it
Mario would clearly just use his plunger on Sonic and then force feed him spaghetti until he couldn't eat anymore and would therefore surrender. I think about these things you see
when in a fight with some one whose main move is to jump on your head always go for the one with razor sharpe spikes sticking out of his head head. Nuff said.