User blog comment:Chormira the Autobot/Who's the Fastest?/@comment-1865849-20110827021438/@comment-3970120-20110827040338

I don't count Eggman (enemy not rival! =P), Metal Scourge (He's Scourge's rival not Sonic's), and Knuckles (that "Eggman has a chat with him = wants to kill Sonic" rule only applies in Sonic X and Pre-Adventure games).