The following are known Game Genie Codes for Summer Challenge on SEGA Genesis.

• No Time Limit To Shoot In Archery Event (You Normally Only Get 30 Seconds To Shoot)
  2D9T-AGHT
• Missed Gates Don’t Count In Kayak Event
  AV0T-EA2G
• Knockdowns Don’t Count In Equestrian Event
  AV1T-CA62
• 9 Tries In Pole Vault Event (Instead of Only 3)
  BDJT-CAAL
• 9 Tries In High Jump Event (Instead of Only 3)
  BCMT-CAHW
• 9 Tries In Javelin Event (Instead of Only 3)
  BCPA-EAD2
• You Only Need To Complete 2 Laps In The Cycling Event (Instead of 4 Laps)
  HETA-DJ0J
• You Only Need To Complete 1 Lap In The Cycling Event (Instead of 4 Laps)
  HETA-DT0J