Pitfall: The Lost Expedition Cheats

HOLD L + R and press Left,
Up, Down, Up, X, Up, Up

Instead of hitting or kicking the pillars towards them, you can get your pick axes out and spin around by pressing Down then repeatedly pressing C-stick Up. Note: You are invincible when doing this, but you still need to be careful when Harry becomes dizzy. Quickly press A to stop being dizzy and start spinning again before they resume shooting at you.

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).

Hold L+R at the title screen and press Left,Right,Left,Right,Y,Y,Y to unlock Pifall 2: The Lost Caverns

Hold L+R at the title screen and press Left,B,X,Down,B,A,B,X to unlock the Bottomless Canteen

Hold L+R at the title screen and press Left,Right,X,Up,X,Right,Left to unlock Hyper Punch Mode.

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

Left, Right, X, Up, X, Right, Left