The following are known Game Genie Codes for R.C. Grand Prix on SEGA Game Gear.

• 1st Race Is 0:45 Instead Of 1:00
  2DD-68D-19A
• 1st Race Is 2:00
  78D-68D-19A
• 1st Race Is 4:15
  FFD-68D-19A
• 2nd Race Is 0:45 Instead Of 1:30
  2DD-69D-803
• 2nd Race Is 2:00
  78D-69D-803
• 2nd Race Is 4:15
  FFD-69D-803
• 3rd Race Is 0:45 Instead Of 1:20
  2DD-6AD-A2B
• 3rd Race Is 2:00
  78D-6AD-A2B
• 3rd Race Is 4:15
  FFD-6AD-A2B
• 4th Race Is 0:45 Instead Of 2:00
  2DD-6BD-E60
• 4th Race Is 2:00
  78D-6BD-E60
• 4th Race Is 4:15
  FFD-6BD-E60
• Time For All Races Is 4:15
  3EB-94F-80E
  FFB-95F-193
• Items Are Free If You Have Enough Money
  000-BFC-5DD
  000-C0C-A23