The following are known GameShark Codes for Professional Underground League of Pain on Sony Playstation (PS1).
These codes were also known as Action Replay Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

• Infinite Time 1
  800BCBD2 0905
• Infinite Time 2
  800BCBD4 0006
• Team 1 Score Modifier
  800BCBA0 ????
  800BCBA4 ????
  800BCBAA ????
• Team 2 Score Modifier
  800BCBBC ????
  800BCBC0 ????
  800BCBC6 ????