Game Cheats:
1-Player Kart Race:
This feature becomes available when you beat Route 101 or Route 280.
2-Player Kart Race:
This feature becomes available when you beat either Kart Race Action Stage (Route 101 or Route 280), then beat the other.
Alternate way for an 'A' Ranking:
When you complete a level with ALL the rings collected you will get a 'Perfect' stamp on the Ring Count and a guaranteed 'A' rank.
Unlock Characters:
When you complete the following tasks the corresponding playable character will become available in Versus mode.
Chao:
Beat ALL of Tails' levels with an 'A' rank.
Amy:
Beat ALL of Sonic's levels with an 'A' rank.
Big:
Get A ranks on ALL of Eggman's stage.
Chaos 0:
Beat ALL of Rouge's levels with an 'A' rank.
Mecha Sonic:
Beat ALL of Shadow's levels with an 'A' rank.
Tikal:
Beat ALL of Knuckles' levels with an 'A' rank.