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

• SXKISXVK
  Infinite Lives
• GZVZNIVG
  Freeze Timer
• LEEGOYPA
  Gain 3 of most items
• AEOKSYPA
  Never lose most items
• PAUSAAAA
  Start on Stage 2
• ZAUSAAAA
  Start on Stage 3
• LAUSAAAA
  Start on Stage 4
• GAUSAAAA
  Start on Stage 5
• IAUSAAAA
  Start on Stage 6
• TAUSAAAA
  Start on Stage 7
• YAUSAAAA
  Start on Stage 8
• AAUSAAAE
  Start on Stage 9
• AAOSIAZA + AESIVTZA
  Start with 1 Life
• IAOSIAZA + IESIVTZA
  Start with 6 Lives
• AAOSIAZE + AESIVTZE
  Start with 9 Lives