Original Pitfall game
At the title screen, hold L + R and press B(2), Left, Right, B, X, A, Up, B. If you entered the code correctly, a message will appear. The "Original Pitfall" option will be unlocked at the "New Game/Load Game" screen.

Original Pitfall 2: Lost Caverns game
At the title screen, hold L + R and press Left, Right, Left, Right, Y(3). If you entered the code correctly, a message will appear. The "Lost Caverns" option will be unlocked at the "New Game/Load Game" screen. Alternately, buy all items from the Shamans and collect all Idols.

Play as Nicole
At the title screen, hold L + R and press Left, Up, Down, Up, B, Up(2). If you entered the code correctly, a message will appear.

Bottomless canteen mode
At the title screen, hold L + R and press Left, X, B, Down, X, A, X, B. If you entered the code correctly, a message will appear. Your canteen will now have an unlimited amount.

Hyper punch mode
At the title screen, hold L + R and press Left, Right, B, Up, B, Right, Left. If you entered the code correctly, a message will appear.