Level select:

Hold L1+ L2 + R1 + R2 at the main menu, press Left,
Circle, Triangle, Up, Square, then immediately 
release L1, L2, R1, and R2. 


Bones air strike:

Press Down, Up, Circle, Down, Up, Down, L1 
during game play. 


Cow strike:

Press Up, Down(2), L1, Right during game play. 


Seal:

Press Circle, Triangle(2), L1, Right during
game play. 


Bones seal:

Press Triangle, Right, Circle, Left(2) during game play 


Super chain gun:

Press Left, L1, Down, Square, Triangle, Up, Down 
during game play. 


Super gun:

Press Right, Up, Down, L1, Down, Circle, Left(2) 
during game play. 


Homing bullets:

Press Square, L1(2), Right during game play. 


Thumper weapon:

Press Down, Up, Left(2), Triangle, Up, Right, 
Down during game play. 


Twister weapon:

Press Down, L1, Square, Triangle, Right, Up,
X during game play. 


Grenade:

Press Triangle, Circle, Square(2), L1, Right
during game play. 


Sniper grenade:

Press Up, Square, L1, Left, Circle, Triangle 
during game play. 


Homing sniper grenade:

Press Left, Up, X, Triangle, L1(2), Right 
during game play. 


Mortar:

Press Left, L1, Triangle, Square, Right, 
Circle, Left(2) during game play. 


World's most interesting bomb:

Press Down, Right, Circle(2), Left(2), Up, 
Square, Triangle during game play. 


World's smallest nuke:

Press Down, Up, Square, Triangle, Down, 
Circle(2), Right during game play. 


Dummy decoy:

Press X, L1, Right, Circle, X, Up, Square
during game play. 


Full hit points:

Press Right, L1, Square, Triangle, L1, Down 
during game play. 


Faster speed:

Press Right, Circle, Triangle, Circle, X 
during game play. 


Nodie:

Press Circle, Triangle(2), Circle, Right, Up, 
Left, L1, Square during game play.
 

Earthworm Jim power-up:

Press Up, Down(2), L1, Right during game play. 


by Mark Tkaczyk