Curious George cheats for GameCube ( GCN )

Ape mode - Pause the game, then hold Z and press B(2), A, Y, B.
Fez and rollerskates - Pause the game, then hold Z and press X, A(3), B.
Infinite bananas - Pause the game, then hold Z and press A, X(2), Y, A.
Reversed gravity - Pause the game, then hold Z and press Y(2), B, A(2).