Level Select:
At the title screen enter L2, R1, L1, R2, Left, Right, Circle, Square, R2, L2.
This will bring up a menu with a list of all the stages.

Extra lives:
At the title screen enter L2, R2, L1, R1, Down, Up, Up, Down.

Force Weapon:
At the title screen enter: L2, R2, L1, R1, Up. Down, Down, Up During game hold
square and press triangle to change weapon.

Unlimited Continues:
At the title screen enter: L2, R2, L1, R1, Left, Right, Right, Left

Movies:
At the title screen enter: L2, L1, R1, R2, Up, Left, Down, Right

Hidden Game 1:
At the title screen enter: L2, L1, Left, Right, R1, R2

Hidden Game 2:
At the title screen enter: R2, R1, Right, Left, L1, L2

Sound Effects:
At the title screen enter: R2, R1, L1, L2, Up, Right, Down, Left

Bamboo Arcade:
At the title screen enter: R2 R1 forward back L1 L2

Bamboo Gyruss:
At the title screen enter: L2 L1 back forward R1 R2

SFX Browser:
At the title screen enter: R2 R1 L1 L2 up forward down back