Aaahh!!! Real Monsters

[final kaoss]

Level Select

When in the first level, part 2 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.

[final kaoss]

Monster Sounds

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.

[kathrynchowell]

I didn't know this before, I'd love to try it.