Ultracore (MJ-1.0)(JP) (Genesis/MD) Game Genie codes

ACCA-DA58
Infinite ammo for extra weapons (as long as you have some).

HVNA-FEDG +
H7NA-EADJ +
AKNA-EA58
Always have all weapons (will still need ammo to shoot the extra weapons).

HVNA-FEDG +
H7NA-EADJ +
AKNA-EA58 +
A4CA-CA48
Always have all weapons and infinite ammo (even if you don't have any ammo). Your ammo amount will decrease when shooting, but you can still shoot even when it reaches zero.