SMASH: Sonic Team

I used to be one of those 'purists' who didn't want to see non-Nintendo characters in Smash but then I changed my mind and I'm receptive to the idea. That said, I don't want it to become a third-party free-for-all so I treated third parties as a franchise in itself and only added one to my roster.
Of course, there are plenty of third partiers I'd love to see playable: Megaman, Bomberman...if MvC can have Phoenix Wright then just imagine how amazing it would be to have Professor Layton in Smash!
Still, I think my choice is a fair and worthy one...