This game is also available on GameCube.
and guess what is speicial about him? when he gets attacked, you will not take any damage at all!
(you will continue playing as super sonic when you are against dr.robotnic)
(without this cheat, you cannot choose your opponents character)
(note that the time gem will not be added to your collection but it will help you unlock some of my cheats that will be unlocked if you beat certain times on time attack mode)
PCM:07, DA:07
PCM:12, DA:25
PCM:03, DA:01
PCM:04, DA:21
PCM:11, DA:09
PCM:12, DA:11