Hold L + R and enter the following combinations:
Bottomless Canteen:
Left, B, X, Down, B, A, B, X.
Original Pitfall:
X(2), 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(2).