Um Jammer Lammy (PlayStation)

GameShark, Pro Action Replay, Xploder, and Xplorer Codes

Note:
A GameShark or Pro Action Replay cartridge is required to use the codes featured below.

North American (NTSC) version

Maximum points:
80078D12 270F

All stages unlocked:
301A58F9 0001
801A58FA 3F3F
801A58FC 3F3F
801A58FE 3F3F
All codes above from Ellay1.

Official codes from InterAct.
Codes from The Game Shark Code Creator's Club.

Japanese (NTSC) version

Codes from The Game Shark Code Creator's Club.