Hyper punch mode:
Hold L + R and press Left , Right , X , Up , X , Right , Left at the title screen. A message will appear to confirm correct code entry.

Bottomless canteen mode:
Hold L + R and press Left , B , X , Down , B , A , B , X at the title screen. A message will appear to confirm correct code entry. Your canteen will now have an unlimited amount.

Play as Nicole:
Hold L + R and press Left , Up , Down , Up , X , Up (2) at the title screen. A message will appear to confirm correct code entry.

Play as Retro Harry:
Hold L + R and press Y , Left , Down , B , X , Y (2), Left at the title screen. A message will appear to confirm correct code entry.

Classic Pitfall mini-game:
Hold L + R and press X (2), Left , Right , X , B , A , Up , X at the title screen. A message will appear to confirm correct code entry. The "Original Pitfall" option will be unlocked at the "New Game/Load Game" screen.

Classic Pitfall 2: Lost Caverns mini-game:
Hold L + R and press Left , Right , Left , Right , Y (3) at the title screen. A message will appear to confirm correct code entry. 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