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

• Infinite Lives
  GXUVTKVK
• Lots Of Erasers
  AZNZEYAE
• Start With 3 Bombs
  LEVLGZPA
• Start With 6 Bombs
  TEVLGZPA
• Start With 9 Bombs
  PEVLGZPE
• Infinite Bombs
  SXSTOTVG
• Infinite Erasers
  SXVVKTVG
• Start With 2 Lives
  PEKGYAZA
  PAKZKYZA
• Start With 7 Lives
  TEKGYAZA
  TAKZKYZA
• Start With 10 Lives
  PEKGYAZE
  PAKZKYZE
• Start With 3 Erasers
  LEKKGAPA
  LAVXXYPA
• Start With 6 Erasers
  TEKKGAPA
  TAVXXYPA
• Start With 9 Erasers
  PEKKGAPE
  PAVXXYPE