The following are known Game Genie Codes for Dragon Crystal on SEGA Game Gear.

• Infinite Hit Points
  214 EBA 6E2
• Start With 75 Hit Points
  4BF FAF 7FB
• Start With 150 Hit Points
  96F FAF 7FB
• Start With 125 Hit Points
  7DF FAF 7FB
• Start With 50 Food
  50F F5F 2AA
• Start With 75 Food
  75F F5F 2AA
• Start With Maximum Food (99)
  99F F5F 2AA
• Infinite Food
  3AE FBD 2A2
• Start On Floor 2 As Ranger
  02F EDF E6E
• Start On Floor 3 As Soldier
  03F EDF E6E
• Start On Floor 4 As Warrior
  04F EDF E6E
• Start On Floor 5 As Fighter
  05F EDF E6E
• Start On Floor 6 As Swordsman
  06F EDF E6E
• Start On Floor 7 As Veteran
  07F EDF E6E
• Start On Floor 8 As Knight
  08F EDF E6E
• Start On Floor 9 As Champion
  09F EDF E6E
• Start On Floor 10 As Hero
  0AF EDF E6E
• Start On Floor 11 As Master
  0BF EDF E6E
• Start On Floor 12 As Paladin
  0CF EDF E6E
• Start On Floor 13 As Warlord
  0DF EDF E6E
• Start On Floor 14 As Dragon Lord
  0EF EDF E6E
• Start On Floor 15 As Avatar
  0FF EDF E6E
• Start On Floor 16 As Master Lord
  10F EDF E6E