Level select
Pause the game, then hold Square and press
Up, Down, Left, Right, Right, Right, Down, Left.
Alternately, pause the game and press
Right, Square, Triangle, Square, Triangle, R1, L1, R1, L1, Triangle, Down.
Level skip
Pause the game, then hold Square and press
Right, Left, Up, Up, Up, Right, Left, Left.
Infinite lives
Pause the game, then hold Square and press
Down, Down, Up, Down, Right, Down, Up, Up.
Alternately, pause the game and press
Right, Square, Triangle, Square, Triangle, X.
All extras and bonus levels
Pause the game, then hold Square and press
Right, Up, Up, Down, Right, Down, Right.
All characters
Pause the game, then hold Square and press
Left, Right, Left, Left, Left, Up, Left, Left.
Temporary invincibility
Pause the game, then hold Square and press
Left, Left, Up, Left, Down, Right, Right, Right.
Turn coins into Mad Garibs
Pause the game, then hold Square and press
Right, Left, Right, Left, Up, Up, Left, Right.