The following are known Game Genie Codes for Tom and Jerry on Nintendo Game Boy.

• 01F-7BB-E66
  Start the game with 1 life
• 05F-7BB-E66
  Start the game with 5 lives
• 008-54D-B3D
  Infinite lives
• FA6-84B-4C1
  Infinite balls once collected
• 00D-47D-3BA
  Infinite energy (You may need to die once first)
• 110-67B-E6E
  Every time you collect one cheese you get 11 (can’t go over 100)
• FAC-3FE-4C1 + FAC-43E-4C1
  Infinite time