Sonic Unleashed Game

Never Ending Unleash Mode
This cheat has to be entered in the cheat input option or it doesn't work. The cheat code only works for the GameCube controller. The cheatcode order is Y X L B R A is the code order.

Final Adabat Mission
Collect all Art, Music, Movies and Secret Documents (except for Movie #36) to unlock the final Adabat mission

Secret Cutscene
Once you've achieved all S-Ranks and completed all missions in the game, you'll unlock the final mission. Complete it and collect the hidden item to unlock the "Sonic Omake" cutsecene.

Dark Gaia
This is a 3 phase fight, so:

Phase 1: Your the Gaia Colossus this round. Move left to dodge left, right for righr, you get the point.Punch DG after he attacks to damage him easily. Repeat until phase 2.

Phase 2: It's basically a 3-part Sonic day stage. Dodge stuff, then run off the ramps and press the buttons to poke out his eyes.

Phase 3: About time we get Super Sonic! Collect rings until you get a charge, then move to the left or right until you get a lock-on. Shake the remote to start the charge. Dodge the meteors, then hit one of his eyes. Keep doing this. After 5 hits, the meteors start moving. Don't worry, things are actually easier with this. After you hit DG's first 6 eyes, he opens up the big center one. Hit this to end the fight and finish the game.

Speedy Start
During the countdown to the start of a level, swing the Wiimote after "one" but before "Go" and Sonic will do a spin boost to start out.