- INVINCIBLE:
DURING THE GAME, HOLD RIGHT, PRESS B, X 3 TIMES, B, X, Y, A.
- UPGRADE WEAPON:
DURING THE GAME, HOLD RIGHT, PRESS B, B, Y, Y, X 3 TIMES, A.
- LEVEL SELECT:
DURING THE GAME, HOLD RIGHT, PRESS X, X, B, Y, Y, B, X, A.
- SKELETON ZEKE:
AFTER TURNING ON THE GAME AND BEFORE LEGAL INFO SCREEN APPEARS, HOLD A+B+X+Y UNTIL TITLE SCREEN APPEARS. NOW START THE GAME.
- INVISIBLE ZEKE:
AFTER TURNING ON THE GAME AND BEFORE LEGAL INFO SCREEN APPEARS, HOLD A+B+L+R UNTIL TITLE SCREEN APPEARS. NOW START THE GAME.