The following are known Code Breaker Codes for Klonoa: Empire of Dreams on Nintendo Game Boy Advance (GBA).

These codes are for the U.S. version of the game.

• Master Code – Must Be On
  97689137 46CF
  E64915BD 550C
  0B96A3A6 EB78
• Infinite Health
  2C9402A9 CAAE
• Moon Doors Always Open
  FBEB489E 16B0
• Infinite Lives
  741450AC D880
• Invincible
  011B33AB 6CCE
• Infinite Health & Have All Items
  710454C6 1D21
• Press A for Floater
  24A98F91 6AFE
  B9C44E65 A313