The following are known Game Genie Codes for The Bugs Bunny Crazy Castle on Nintendo Entertainment System (NES).

• Start With Infinite Lives
  SZOKGPVG
• Start With 1 Life
  PAUGPAIA
• Start With 10 Lives
  ZAUGPAIE
• Start With 42 Lives
  ZZUGPAIE
• Start With 90 Lives
  ZIUGPAIE
• Become Invincible
  GXETZZEI
• Baddies Go As Fast As Bugs Bunny
  GXKGZZEY
• Make Platforms Invisible
  GASGAAPA
• Start With Super Rabbit Punches
  PXXTGGEN
  PXXTAGAO
• Start On Level 10
  SZOKGAAX
  PEXYVYAE
• Start On Level 20
  SZOKGAAX
  LOXYVYAA
• Start On Level 30
  SZOKGAAX
  IOXYVYAE
• Start On Level 40
  SZOKGAAX
  YXXYVYAA
• Atari Version
  TASGAAPA
• Golden Bugs Mode
  AASGAAPA
• Lights Out Mode
  GTSGAAPA