Game Shark Codes:

Master code "must be on"
EC8B53C8 142898C8

P1 Scores 0
3D464402 1456E7A5

P1 Scores 99
3D464402 1456E788

P2 Scores 0
3D464410 1456E7A5

P2 Scores 99
3D464410 1456E788