The following are known Game Genie Codes for Little Nemo: The Dream Master on Nintendo Entertainment System (NES).

• PEKKSZLA
  Start with 1 Life
• TEKKSZLA
  Start with 6 Lives
• PEKKSZLE
  Start with 9 Lives
• SZOKSLVG
  Infinite Lives
• TOKZKNZA
  Mega-Jump
• SXKTGEVK
  Infinite “Life”
• PEUKOZAA
  Start on Stage 2
• ZEUKOZAA
  Start on Stage 3
• LEUKOZAA
  Start on Stage 4
• GEUKOZAA
  Start on Stage 5
• IEUKOZAA
  Start on Stage 6
• TEUKOZAA
  Start on Stage 7
• YEUKOZAA
  Start on Stage 8
• GESLYPPA + UYUUIOVN
  Speed Jumps
• ZEXLLPPA + SYEUPOVN
  Super Speed