Earthworm Jim
Contributed by: Richard

Weird code:
During gameplay, hit Start to puse. Hit Y, A, B, B, A, Y, A, B, B, A.
Nick Jones (with five different haircuts) tells you that you've entered
a code that no loner works.

Debug screen:
During gameplay, hit Start to pause.  Press and release Left and A
simultaneously, then hit  B, X, A, A, B, X, A, and Start.  A picture of
the EWJ design team appears. Then you'll see the debug menu, where you
can select level and ivincibility.

Level skip:
During gameplay, hit Start to pause.  Hit A,  B, X, A, A+X, B+X, B+X,
and A+X.  A "Groovy screen appears, then a new screen announcing your
new level.

Weapons and continues:
Hit Start to pause, and then enter these codes to gain advantages.
Extra Plasma Shot:
A, A, B+L, A, A, X, B+L, and X
Extra continues:
A, B, A, B, X, Y, X, and Y
Fill weapons to 1,000 rounds:
A, B, B+L, B, X, A, X, and X
Extra Life:
B, B, A, X+Y, A, A, A, and A