Sound test: Press any direction on the D-pad, followed by
A, B, X, or Y at the Nickelodeon screen.
The sound that is played will vary, depending on which D-pad
direction and button were pressed.
Information in this section was contributed by Full-Gore.
Level select: Go to the trash heap during the second part of level
1. Press L, L + R, R(2), Up,
Down, L + R, Select, Start.
The sound of a scream will confirm correct code entry.
Make Grumble blink: Press L or R on the screen that appears
before the start of a level.
Make Grumble open his eyes wide: Hold R + Down when Grumble appears before
a level begins or at the options screen. After releasing the buttons,
Grumble will appear to be angry.
Information in this section was contributed by Full-Gore.
