Raph is best suited for this type of thing, he is the badass of the group, the one that likes to fight most. Leo is the born leader, & probably the most disciplined of the four I don't see him entering a Battle Zone tourny unless forced to, it's just not in his character. Donny is the smart one of the group, he knows how to & can fight if necessary but I think he would most likely pass on a Battle Zone invite to go work on some new gadget, Mikey...Mickey is just a ******, he can fight but he'd rather skateboard through the sewers while chowing down on some pizza, than fighting for fun. The Battle Zone IS something Raph would enter just for fun & to prove how much of a badass he is. Plus he's my favorite, so my vote goes Rapheal