The following are known Game Genie Codes for Castle of Dragon on Nintendo Entertainment System (NES).

• Stop Skeletons From Fighting
  PEVPULAP
• Enemies And You Each Fight Faster
  GEOGYZPA
• Super Strong Monsters
  ZPSLONLP
• No Harm From Most Monster Attacks
  SZVUSNVK
• Infinite Energy
  YNOLSYAE
• Super Energy
  NYXKLAGE
• Start With Knives
  ZAXGLAAA
• Start With Knives And Mace
  LAXGLAAA
• Start With Armor
  EAXGLAAA
• Start With Armor, Knives & Mace
  UAXGLAAA