Pro Action Replay Codes:
Invincible - 00C158:01 -Rid
Infinite Lives - 00C123:09 -Rune
Black Floors - 00C110:02 -Rune

Game Genie Codes:
Start with 5 lives - 040-8DF-E62 -Galoob
Start with 7 lives - 060-8DF-E62 -Galoob
Start with 9 lives - 080-8DF-E62 -Galoob
Infinite lives - 21A-63D-2A2 -Galoob
Floor doesn't move - 004-A6E-3BE -Galoob
The below Game Genie codes are for practice only. Switch off to go on to next level
Start on stage 2 - 025-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 3 - 035-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 4 - 045-CCE-B3E + 005-C9E-6EA + 005 CAC E62 -Galoob
Start on stage 5 - 065-CCE-B3E + 005-C9E-6EA + 005 CAC E62 -Galoob
Start on stage 6 - 075-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 7 - 0A5-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 8 - 0B5-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 9 - 0D5-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 10 - 0E5-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 11 - 0F5-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 12-1 - 115-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 12-2 - 125-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 12-3 - 135-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 12-4 - 145-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 12-5 - 165-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 12-6 - 175-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Start on stage 12-7 - 185-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob
Watch ending - 195-CCE-B3E + 005-C9E-6EA + 005-CAC-E62 -Galoob