Pause the game and press A and LEFT together, then B, B, A, then A and RIGHT together, then B, B, A. Unpause and you'll be greeted by a picture of the development team with the sound byte "Cheater" then be in cheat or debug mode. Confirmed to work on Virtual Console version.
Pause and press: A + C, A + C, A + C, A, B, C, B, A.
Pause the game and press: A + C, B, B, C, C, C, A, B.
Pause and enter the following: A + Up, B, A, C, A, A, C, B.
At any time, pause the game and press B and Up simultaneously, then press B, A, C, A, A, A, A. You will hear Earthworm Jim say ''Cheater! Wheee Doggy!.'' When you unpause the game, you will see that you now have an extra life. You can perform this code as many times as you want.
Pause game play and press A + C, A, B, C, B, C, A, C(2).
Pause game play and press A + C, B(2), C(3), A, B.
Pause the game and enter: A, A, A, A, A, A, B, C.
Pause game play and press Right + A, A(2), B, A, C, B, A.
Pause the game and press: A + B, A + B, C, A, Right, Right, Left, Right.
Buttville pasword on the Difficult setting. Redball, Cow, Atom, Atom, Cow.
Pause game play and enter one of the following codes to start game play at the corresponding level.
Level Password
What the Heck? Press A, Right, A, C(2), Left, Right, A.
Snowman Press Right(3), A, C, Left, Right, B.
Evil the Cat Press Up, Down, Right, C(2), Left, Right, B.
Big Bruty Press C(3), Left(3), Right(2).
Down the Tubes Press Up, Down, Left(2), Up(3), Down.
Tube Race Press Up(2), Left(2), Down, Left, Up, C.
Snot a Problem Press C, B, C, Right(2), Left, A, B.
Snot a Problem 2 Press Up, B, C, Down(3), A, C.
Snot a Problem 3 Press A, Up, C, Up(2), Down, C, A.
Lab Press A, B(2), Down, Right(2), Left, Right.
Chicken Plummets Press A, B, C, Up, Down(3), Right.
Naked and Lovin' It Press C, A, C, Left, Right, Up, Down, Right.
For Pete's Sake Press A, B, C, A, B, A, Down, Right.
Andy Asteroids Press A, Left, A, C(3), B(2).
Andy Asteroids 2 Press C, Down, A(2), Down, B(2), Down.
Andy Asteroids 3 Press A, Down, Left, A, C(2), A, B.
Andy Asteroids 4 Press A, Down, A(2), C(2), A, B.
Andy Asteroids 5 Press A, Left, A, C(2), Down, Up, A.
Andy Asteroids 6 Press A, Right, A(2), Right, B, Up, A.
Intestinal Distress Press C(2), A, Right, Left, Right, B(2).
Who Turned Out the Lights Press A + C, B, Up, Left, Right(2), Left(2).
Who Turned Out the Lights 2 Press A, B, Up, B, Left, Right, C, Up.
Who Turned Out the Lights 3 Press A, B, C, Up, Left, A, Right(2).
Who Turned Out the Lights 4 Press A, C, Up, Left, C, Right, Left, B.
Who Turned Out the Lights 5 Press C, B, Up, Down, Left, Right(2), Left.
Queen of Buttville Press A, C, Left, Right, B, Left(2).
Buttville Helicopter Press B(2), Down(2), A, Right(2), Down.
Psycrow Press C, B, Up, Down(2), Right, Down, Right.
Pause the game and enter: B, B, A, C, A + B, A + B, A + B, A + B.
Begin your game, take controller one and press START to pause at any point, Now press A, B, B, A, A+C, B+C, B+C, A+C. You'll skip to the next level.
Pause the game and press: B, B, A, A, A, A, B, C.
Pause the game and enter A, C, C, A, B, B, A, C.
Pause game play and press C + Up, A(2), C, A, B, C(2).
Pause the game and press: C, A, A, A, A, B, C.
At any time, pause the game and press C and Down simultaneously, then press A, B, C, A, B, A, C. You will hear Earthworm Jim say ''Cheater! Plasma!.'' Now when you unpause the game, you will have nine plasma shots. You can do this as much as you want.
When playing the first level, pause the game and press, L, R, A, B, C, L, R, A.
Skip to the end of the game
Pause the game, and press A+C, A+B, C, C, B, B, A, A. You will hear Earthworm Jim yell ''Cheater'' and you will be brought to the ending scene of the game.
Press START to pause then enter one of the following codes:
Earn one continue: A, B+Left, A, B, A, B, C, A
Fill weapon to 1,000 rounds: A, B, B, B, C, A, C, C
One free guy: B, B, C, C, A, A, A, A
Plasma Shot Weapon: C, A, B, C, A, B, A, C
Pause game play and press A + C, A + C, A + C, A, B, C, B, A.
Pause the game and press: A + B, C, C, C, A, B, B, B.
Pause the game and enter: A + C, A, B, B, C, A, C, C.
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