User blog comment:Wassboss/Round 1: Captain Falcon vs Sonic/@comment-4484220-20120804183735/@comment-143604-20120804204102

It's official canon...from a continuity that is not being discussed here. This is the Smash Brothers universe Sonic the Hedgehog, not the one from the main Sonic games. Simple as that. It's not limiting, it's not illegal, it's just an alternate version of the character.