AAAHH!!! Real Monsters Cheats

When in part two of the first level, go to the trash heap and press: L,L+R,R,R,Up,Down,L+R,SELECT,START. If done right you will hear a scream.

When the Nickelodeon logo appears on the screen, press any direction on the control pad to start the theme music. Now press A, B, X, or Y to make sounds.

Grumble is the monster who appears while a level loads.

Make Grumble Angry:
To make Grumble angry, hold R and Down on the D-Pad.

Make Grumble Blink
To make Grumble blink, simply press L or R.