Nightmare Creatures II Cheats

Highlight the Option selection at the new game menu. Hold B for about three seconds, then release the button, then press Y, A, X, B. Hold X for approximately one second, release the button, then press B.

In the middle of the game, press Start to pause.

Next, hold the L and R Triggers together and input:
Left, B, X, Left, B, X, Left, B, X, A, X