User blog comment:Bionicleboy3000/Metal Sonic: The most overpowered robot in fictional existence?/@comment-3437898-20130107153258/@comment-115265-20130107225702

About Metal Sonic Kai: I actually have played Chaotix. Beat it, too. Good ending and all. The reason I don't include it is because it was apparently retconned as of Heroes, if the claim of Team Chaotix being "reimagined" as opposed to "reappearing" is to be taken that way.

About Unicron: Funny story, I actually got into an argument with someone about him over this. We eventually agreed that they would be on equal footing of they fought, all things considered. And neither would win, or lose.