The following are known Game Genie Codes for Chuck Rock on SEGA Game Gear.

• Start With 1 Life
  008 52E E66
• Start With 2 Lives
  018 52E E66
• Start With 6 Lives
  058 52E E66
• Start With Mega Energy (1st Life)
  88A 5CE F72
• Start On Level 2
  02E EBF E6A
• Start On Level 3
  03E EBF E6A
• Start On Level 4
  04E EBF E6A
• Start With Lots of Lives
  3AB 0EE 19D

  Note: Ignore the Lives Counter