The following are known Code Breaker Codes for Rugrats: Castle Capers on Nintendo Game Boy Advance (GBA).

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

• Master Code – Must Be On
  916CA87B F80E
  67CB4195 FA99
  3EA1D49E FAFB
• Infinite Health
  9E4D8189 75A8
• Infinite Throwing Objects
  1C79818D A5A8
• No Bonus Point Objects Left
  C306787C 4B57
• Max Diapers (Health)
  32007388 0063
• Max Ammo (Projectiles)
  8200738C 03E7
• Zero Items Needed
  32007390 0000