The following are known Game Genie Codes for Fantasy Zone on Nintendo Entertainment System (NES).

• Infinite Lives
  OZEVYTVK
• Start With 1 Life
  PAXVOPLA
• Start With 6 Lives
  TAXVOPLA
• Start With 9 Lives
  PAXVOPLE
• Keep Bought Weapon For A Life
  OXETOAVK
• Autofire On All Weapons
  AAOVKTPA
• Start On Level 2
  PASVYYAA
• Start On Level 3
  ZASVYYAA
• Start On Level 4
  LASVYYAA
• Start On Level 5
  GASVYYAA
• Start On Level 6
  IASVYYAA
• Start On Level 7
  TASVYYAA
• Keep Bought Weapon Until Next Shop Visit
  OXETOAVK
  OGOVATSE