The following are known GameShark Codes for PaRappa the Rapper 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.

• Joker Command
  D01C3658 ????
• Rapping Modifier
  801C368E 000?
  Rapping Modifiers
  • 00: Cool
  • 01: Good
  • 02: Bad
  • 03: Awful
• Always Score 999 Points
  801C3670 03E7