The following are known Game Genie Codes for Final Fantasy: Mystic Quest on Super Nintendo (SNES).

• 83AF-D40D
  Infinite Cure Potions
• DDA4-D40D
  Cure Potion Restores Life Points to Maximum
• C96B-64AB
  Infinite Life Points (Can make enemies invincible, you will need to switch off the Game Genie to defeat them.)
• C9B8-D4A6
  Infinite Ninja Stars
• C9B0-D7A6
  Infinite Bombs (In Battle)