The following are known Game Genie Codes for Heavyweight Championship Boxing on Nintendo Game Boy.

• 00B-A4E-E6E
  No Ring Timer
• AF6-E1B-19E
  No Round Increase
• 008-B2E-19E
  Juggle your power (This can alter power settings and give full power in all categories)
• 014-78F-E66
  Start with Punch, Life and Speed at 1
• 024-78F-E66
  Start with Punch, Life and Speed at 2
• 034-78F-E66
  Start with Punch, Life and Speed at 3
• 044-78F-E66
  Start with Punch, Life and Speed at 4
• 054-78F-E66
  Start with Punch, Life and Speed at 5
• 064-78F-E66
  Start with Punch, Life and Speed at 6
• 074-78F-E66
  Start with Punch, Life and Speed at 7
• 084-78F-E66
  Start with Punch, Life and Speed at 8
• 094-78F-E66
  Start with Punch, Life and Speed at 9
• 994-78F-E66
  Start with super power