Hold L + R and enter the following:

Bottomless canteen:
LEFT, B, X, DOWN, B, A, B, X

Original Pitfall:
X, X, LEFT, RIGHT, X, B, A, UP, X

Hyper Punch Mode:
LEFT, RIGHT, X, UP, X, RIGHT, LEFT

Play as Nicole:
LEFT, UP, DOWN, UP, X, UP, UP

Super Punches
Left, Right, X, Up, X, Right, Left