The codes should work with the region specified but may work for other regions as well.
Device Compatibility: Action Replay, CodeBreaker & GameShark
Have Chaingun/RPG
800eca1c0101
Infinite Chaingun Ammo
800ec94000c8
Infinite Pistol Ammo
800ec93c00c8
Infinite RPG Rockets
800ec9420032
Infinite Shotgun Shells
800ec93e0032
Shotgun
800eca1a0101
Have Devastator/Freezer
800eca200101
Have Pipe Bombs/Shrink Ray
800eca1e0101
Infinite Devastator Ammo
800ec9480063
Infinite Pipe Bombs
800ec9440032
Infinite Shrink Ray Ammo
800ec9460032
Infinite Freezer Ammo
800ec94c0063