Level select
Press [Start] to pause game play, then press [Right], [R], [B], [A], [L]x2, [A], [R].
Alternately, press [Start] to pause game play, then press [R], [L], [A], [B]x2, [L], [R].
Buttville level
Press [Start] to pause game play, then press [L], [A], [Up], [R], [A], [R], [A], [Select].
Down The Tubes level
Press [Start] to pause game play, then press [Up], [L], [Down], [A], [R], [A].
For Pete's Sake level
Press [Start] to pause game play, then press [Right], [Left], [R], [L], [A], [R].
Level 5 level
Press [Start] to pause game play, then press [R], [L], [A], [B]x2, [A], [L], [R].
Snot A Problem level
Press [Start] to pause game play, then press [R], [Up], [Select], [L], [R], [Left].
What The Heck level
Press [Start] to pause game play, then press [Select], [R], [B], [Down], [L], [B].