Pro Action Replay Codes:
Infinite Energy - 00C488:48 -Datel
Infinite Continues - 00C40B:07 -Datel
Infinite Time - 00C43B:09 -Datel
Level Select - 00C424:0? -Datel
No Health P1 - 00C488:00 -FALCON
Infinite Health P2 - 00C48A:48 -FALCON
Blood Code Activated - 00C409:28 -FALCON

Game Genie Codes:
Each round is 69 seconds - 063-7B4-C4E -Galoob
Each round is 29 seconds - 023-7B4-C4E -Galoob
Infinite time - 00B-40C-3BE -Galoob
Infinite credits - 004-2D6-19E -Galoob
Blood - DEB-9F6-5D3 -Galoob
Player 1 is invincible - 003-48B-F79 -Galoob
Player 1 starts with 1/2 health - 240-BFD-C4B -Galoob
Player 2 usually starts with 1/2 health - 240-C5D-C4B -Galoob
Punches do more damage - 20B-06F-F7A -Galoob
Most kicks do more damage - 2CB-26F-C42 -Galoob
Foot sweeps do more damage - 30B-86F-C42 -Galoob
Flying punches do more damage - 30B-2EF-D5A -Galoob
Uppercuts do more damage - 33B-56F-A2E -Galoob
Throws do more damage - 2AF-237-D5A -Galoob
Sonya Blade's leg grab does more damage - 2BB-76F-F7A -Galoob
Scorpion's harpoon does more damage - 2BB-66F-F7A -Galoob
Rayden's flying thunderbolt does more damage - 2BB-6EF-F7A -Galoob
Johhny Cage's shadow kick does more damage - 2BB-4EF-D56 -Galoob
Some other special moves do more damage - 37B-36F-D52 -Galoob
Start on match 2 - 01B-C9A-E6A -Galoob
Start on match 3 - 02B-C9A-E6A -Galoob
Start on match 4 - 03B-C9A-E6A -Galoob
Start on match 5 - 04B-C9A-E6A -Galoob
Start on mirror match - 05B-C9A-E6A -Galoob
Start on endurance match 1 - 06B-C9A-E6A -Galoob
Start on endurance match 2 - 07B-C9A-E6A -Galoob
Start on endurance match 3 - 08B-C9A-E6A -Galoob
Start on match against Goro - 09B-C9A-E6A -Galoob
Start on match against Shang Tsung - 0AB-C9A-E6A -Galoob
Start with 1 credit - 02B-E1A-F76 -Galoob
Start with 5 credits - 06B-E1A-F76 -Galoob
Start with 10 credits - 0BB-E1A-F76 -Galoob