Curious George
Infinite bananas
Pause the game, then hold Z and press A, X(2), Y, A.
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.
Reversed gravity
Pause the game, then hold Z and press Y(2), B, A(2).