Alrighty, guys, I'm just going to summarize my point from literally a year ago in this exact thread, because you guys are just talking about the same things over and over again. The following is the official position on the matter, as stated LAST YEAR in this thread:
1. Sonic is the only character that can go super in single player or cooperative mode.
2. We are CONSIDERING adding a Pandora's Box option to allow you to change this. This does NOT mean we are going to add it. It means we are considering it.
I am going to lock this topic because it's turned into a complete chain of fail.