At the level selection dome, press R1 + Select. Then, press X, Square, X, Right, Up, Left, Circle(2), Down(2).
While in a stage, press R1 + Select. Then, press Circle, Start, Right, Up, Square, Left(2), Up, Start.
Pause the game, hold R1 and press Circle(2), Left, Down, Circle, Up, Right.
Pause the game, hold R1 and press X, Circle, Up(2), Down, Right(2).
Pause the game, hold R1 and press Down, Start, Right(2), Down, Up, Start.
Pause the game, hold R1 and press X, Up, Right, Up, Right(2).
Pause the game, hold R1 and press Right, Left, Right, Circle, Triangle, Right, Circle, Down, Right.
Pause the game, hold R1 and press X, Square, Down(2), Up, Down, Right.
Pause the game, hold R1 and press Up, Circle, Triangle, Down, Right, Square, Down.
Pause the game, hold R1 and press Circle, Right(2), Down, Triangle, Down, Circle, Right(2), Down, Triangle, Down, Start. Now the extended ending of the game will be displayed. This is the ending is normally seen only after the Planet X level has been completed.
| Level | Password |
| Cemetery 1 | SVZFKHGP |
| Cemetery 2 | BXRFYHGP |
| Cemetery 3 | ZVTCYHGP |
| Toonville 1 | RVTCSHGP |
| Toonville 2 | XVVBRHKP |
| Jungle 1 | KXVKRHKP |
| Jungle 2 | CVHCSHKP |
| Jungle 3 | SVKLPHKP |
| Jungle 4 | CVBLPHKP |
| Kung Fu Land 1 | YTCHPHKP |
| Kung Fu Land 2 | ZTDHPHKP |
| Kung Fu Land 3 | DXVGRHKP |
| Rezopolis | GYVYRHKP |
| Rez Battle | PZYPRXYL |
| Planet X | RYYRYXKB |
| Joker Command | D009823C ???? |
| Infinite Lives | 8009732C 0063 |
| Invincible | 80097BD8 0001 |
| Infinite Gold Flies | 80097AF8 0063 |
| Blurr Mode | 80097CCC 0001 |
| Fireball Mode | 80097BD6 0001 |
| Moon Jump | D009823C 0400 800D752A FFFB |