Alternative Shadow - Finish all shadows levels
Alternative Knuckles - Finish all Knuckles' levels
Alternative Rogue - Finish all Rogue's levels
Tornado Kart Tails - Finish all Tails' levels
Eggwalker Kart Eggman - Finish all Eggman's levels
Amy Rose - Finish all Sonic's missions with an 'A' Ranking
Tikal - Finish knuckles' missions with a 'A' rating
Metal Sonic - Finish Shadow's missions with an 'A' Rating