The following are known Game Genie Codes for Ninja Gaiden II: The Dark Sword of Chaos on Nintendo Entertainment System (NES).

• AEKGVTZA
  Start with 1 Life
• IEKGVTZA + SEKKKTSP
  Start with 6 Lives
• AEKGVTZE + SEKKKTSP
  Start with 9 Lives
• SXXGXAVG
  Infinite Lives
• SZNGKGSA
  Almost Invincible
• LEUOSATA
  Half-Energy from Medicine
• GEUOSATE
  Double Energy from Medicine
• SXVKLTVG
  Stop the Timer
• GXKKUIVA
  Never lose Ninja Power Item
• ZEXGYAPA + SNEKYEVN
  Fast running Ryu
• LEXGYAPA + KNEKYEVN
  Mega-fast running Ryu
• IAUONEZA + IAKOOEZA
  Half-Energy from Blue Ninja Power
• GPUONEZA + GPKOOEZA
  Double Energy from Blue Ninja Power
• GOEPOEZA + ZEOOEAPA
  Double maximum Ninja Power from Scroll
• SVOPXXSN + SVOOKXSN + SVXOXXSN
  All Powers use up only 5 points
• XXEOSZVZ + LOEOVXIY + PUOOSXLK
  Infinite Ninja Power