The following are known GameShark Codes for Batman: Gotham City Racer 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.

• No Wall Damage
  D0044274 00F8
  80044276 2400
• Infinite Turbo
  D00473D0 0190
  800473D2 2400
• Stop Timer
  D0042ABC 00D0
  80042ABE 2400
• Unlock All Levels
  80066236 0033
  Note: In order for this code you work, you have to enter a game and then exit. After doing so, all the levels will be unlocked.