Pro Action Replay Codes:
Infinite Health - 00C53E:06 -Rune
Infinite Lives - 00C53D:09 -Rune
Invulnerability - 00C5D2:FF

Game Genie Codes:
Invulnerability - 005-85C-7F4
Start with 1 life - 002-4FA-E66 -Galoob
Start with 2 lives - 012-4FA-E66 -Galoob
Start with 6 lives - 052-4FA-E66 -Galoob
Start with 10 lives - 092-4FA-E66 -Galoob
Infinite lives - 3A3-C8A-2A2 -Galoob
Start with energy at 1--1st life - 012-4AA-F7A -Galoob
Start with energy at 6--1st life - 062-4AA-F7A -Galoob
Start with energy at 9--1st life - 092-4AA-F7A -Galoob
Start with energy at 1--after 1st life - 013-C0A-F7A -Galoob
Start with energy at 6--after 1st life - 063-C0A-F7A -Galoob
Start with energy at 9--after 1st life - 093-C0A-F7A -Galoob
After pick-up, keep weapons until end of level - 3A4-39C-2A2 -Galoob
Infinite time - 001-7BB-19E -Galoob
Invincible (blinking) - 3A5-93C-2A2 -Galoob
Immunity from water and spikes - C39-95E-E61 -Galoob