Sonic Unleashed Cheats - Wii
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Beginning Boost (Daytime Levels)
When Sonic is counting down at the start of the level, swing the Wiimote after he says one, but before go. Sonic will boost out in a spindash to start the level.
Unlock Final Mission
Collect all Art, Music, Movies and Secret Documents (except for Movie #36) to unlock the final Adabat mission.
Unlock Sonic Omake Cutscene
Achieve all S-Ranks and complete all missions to unlock the final mission. Complete this mission and collect the hidden item to unlock a secret "Sonic Omake" cutscene.