Sonic Colors Unlockables
DS | Submitted by S0n1cF4NInfinite Boost
Infinite Boost: Collect every red special ring
DS | Submitted by SonicFanUnlock Nega-Mother Wisp
Unlock alternate final boss Nega-Mother Wisp: Clear Terminal Velocity with all emeralds. After the credits are done go back into the game. You'll get a cutscene and the final stage will be accessible from the top of the world map.