The following are known Game Genie Codes for Castle of Illusion Starring Mickey Mouse on SEGA Game Gear.

• Infinite Lives
  008 A6E E6E
• Infinite Energy
  003 64C E69
• Start With 2 Energy Stars
  029 76F E66
• Start With 4 Energy Stars
  049 76F E66
• Start With 5 Energy Stars
  059 76F E66
• Timer Starts At 300
  036 C1E F7A
• Timer Starts At 500
  056 C1E F7A
• Timer Starts At 600
  066 C1E F7A