How do you make a character WAD go super?

Many times before, I've created character WADs with super transformation frames, I've collected seven Emeralds and fifty Rings, and used a double jump, but they don't go Super. Is there an SOC I need to include? Does a character need to have a particular ability? (I already tried allowsuper = 1.)
Please help me with this.

Sadly enough, only Sonic can go super in single player by normal means. If you want to see your transformation frames in action, try SMVX.wad. Otherwise, its hardcoded.

What about co-op? Can people who aren't Sonic in co-op go super? If not, are there any gametypes besides match, tag, and CTF where people can go super?

Nope.
Developers don't want it like that.

Dang it. Oh, well. Thanks for explaining that to me.