The following are known Game Genie Codes for George Foreman’s KO Boxing on SEGA Game Gear.

• Infinite Superpunches
  21C 04C 2A2
• Both Boxers Start With 3/4 Energy
  602 CEE E68
• Both Boxers Start With 1/2 Energy
  402 CEE E68
• Both Boxers Start With 1/4 Energy
  202 CEE E68
• Infinite Ring Timer
  000 BED 19E
• 2-Minute Rounds
  02F 59E E66
• 4-Minute Rounds
  04F 59E E66
• 6-Minute Rounds
  06F 59E E66