Press pause and enter the following cheats for the desired effect. Note: The following cheats reflect the original SEGA Genesis controller's button layout. You'll have to apply these codes to your method of input on the Wii's Virtual Console.

Code	Effect
A, A, A, A, LEFT, RIGHT, RIGHT, LEFT	Invincibility
UP, A, B	Manta Shield
C, C, C, C, A, A, B, B	Bubble Gun
A, B, C, C, B, A, B, B	Debug Mode
C, C, C, C, A, A, B, A	Homing Missiles
A, C, C, B, A, A, B, U	Map View Mode
C, C, C, C, A, A, A, B	Mega Plasma Gun
A, B, C, C, C, A, A, B	Extra life
C, B, B, A, C, B, B, A	Ammo Refill
A, B, C, A, B, C, A, B	Energy Refill
A, A, C, C, B, A, LEFT, RIGHT	Continue
A, B, C, A, B, C, A, A	Repeated Energy Refills
A, C, C, A, B, A, B, LEFT	Super Cheat Screen
B, B, C, A, B, C, LEFT, RIGHT	Warp to Inflated Head
A, B, C, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT	Warp to ISO 9000
C, C, DOWN, DOWN, A, RIGHT, RIGHT, LEFT	Warp to Level Ate
C, C, C, C, C, C, A, A	Warp to Puppy Love 1
LEFT, RIGHT, B, C, C, LEFT, RIGHT, A	Warp to Puppy Love 2
RIGHT, RIGHT, A, B, C, LEFT, RIGHT, A	Warp to Puppy Love 3
B, B, C, LEFT, LEFT, LEFT, LEFT, RIGHT	Warp to See Jim Run Run Jim Run
A, B, B, A, C, B, B, RIGHT	Warp to the end of the current level
C, A, C, A, B, A, A, UP	Warp to the end of the game
A, B, C, C, UP, C, LEFT, RIGHT	Warp to The Villi People
DOWN, A, C, LEFT, RIGHT, DOWN, A, C	Warp to Udderly Abducted
C, A, C, A, C, A, C, A	10 Extra Meal Worms
A, B, C, C, B, A, B, B	81 Meal Worms in The Villi People / Inflated Head or Hammer Head
C, C, C, C, A, A, B, C	Barn Blaster
A, A, A, A, B, B, B, B	Bright