Of for the love of.. olympics? God dammit Nintendo. But then, I guess I cant really imagine how a platformer would work with these two. Without it just feeling like a Mario/Sonic double pack game, that is. Hmmm.. unless you could make it to where you can switch between Mario and Sonic at the press of a button and levels are designed with platforming for jumping and long slopes for running. That way it's almost strategic, use sonic in certain parts of the level and use mario in other parts. Hmm. Anywho.