The codes should work with the region specified but may work for other regions as well.
Device Compatibility: Action Replay
- Infinite Health
FF801E:FFFF - Infinite Gun Power
FF801C:FFFF - Infinite Missiles
FF8018:9999 - Infinite Continues
FF80CA:0004 - Gun Modifier
FF8014:000?
Note: Use 0 – 7. 0 is Normal, I think 4 is Shotgun, There’s another one that’s like a Minigun, and 7 pretty much kills anything it touches even though the bullets are invisible.