Forums → Game Walkthroughs → Sonic game codes

Sonic=115310101010101
tails=211313101010101
knuckles=307313131010101
cream=403313131310101
AMY=499313131313101(unlocked when completed game with sonic,tails,knuckles and cream)
[i]SHADOW=595313131313131(unlocked when completed game with amy)

Hope this helps!