Shrek - Platform: XBox

Invincibility
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Press Up, Down(2), B, A(2), X, Down, Up, Left, B at the
title screen. Alternately, press Up, Down(2), B, A(2), 
Down, Up, Left, B. 

Cheats
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Perform at least four good deeds to unlock race mode. Play 
in race mode to get tokens to buy and unlock the following 
cheats: Chalk Mode, Crude Oil Mode, Cyber Shadows, Fast Mode, 
Infinite Flame, Infinite Gas, Invulnerability, Leak Mode, 
Low Gravity, Money For Merlin, Plastic Mode, Super Flatulence, 
and Super Strength.