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.
Contributed By: dot com.
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.
Contributed By: Dogg.
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