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

• AAVEZAZA
  Start with 1 Life
• IAVEZAZA
  Start with 6 Lives
• AAVEZAZE
  Start with 9 Lives
• SZOZUPVG
  Infinite Feathers
• SZXXITVG
  Infinite Stars
• SXNOGGVG
  Infinite Boomerangs
• SXUZZYVG
  Infinite Fireflames
• PAXSXALA
  Only 1 Feather picked up
• TAXSXALA
  6 Feathers picked up
• ZAXSUAGO
  Only 10 Stars picked up
• AZXSUAGO
  40 Stars picked up
• ZAXSKAGA
  Only 1 Boomerang picked up
• ZAXSSAGO
  Only 10 Fireflames picked up
• AZXSSAGO
  40 Fireflames picked up
• YAEILNYA
  Less invincibility time
• AZEILNYE
  More invincibility time