I really feel Sonic should be put in. I really don't see what's wrong with it. His speed as someone else had said would really put a little twist in the character. And spin dashing could be sort of like the way Gannondorf does The Wizard's Foot. You could also use some of the attacks Sonic uses in Sonic Battle.
Oh. What about Yoshi, the dinosaur that is just a little tiny bit taller than Mario? Why don't you get a car and run him over? Maybe he should be tooken out! :Obut he is hedgehog plp come on all you have to do is get a car and squash him to peices