The following are known Code Breaker Codes for Harry Potter and the Chamber of Secrets on Nintendo Game Boy Advance (GBA).

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

• Master Code – Must Be On
  98E1684A 9C80
  3F608B36 9B02
  A0BC1C61 FB1C
• Infinite Health
  02286170 206E
• Maximum Health
  53032273 C6E8
• Have All Gemstones
  0D0C88B6 4FDE

Weapon Modifier Codes

• Press L+Up For Flippado
  84F1556C 107F
  0F084A36 6EC2
• Press L+Right For Incendio
  89F17729 1255
  8F9C5E36 6EC2
• Press L+Down For 3rd Magic Spell
  A8F17D28 1936
  0D08CA96 7ED2
• Press L+Up For 4th Magic Spell
  98F13420 D077
  8D9CDE96 7ED2
• Press R+Up For 5th Magic Spell
  84E1554C 107F
  4F034A26 4EC2
• Press R+Down For 6th Magic Spell
  A8E17D08 1936
  CF975E26 4EC2

Have Codes

• Max Knuts
  E3E75640 F30E
• Max House Points
  E1E7D6E0 F31E
• All Stars
  52230078 D06E
• All Spells
  BDF8F5AC 923B
  8EE8352C B067
  321C687A 6D8A
• All Beans
  FFD3750E B6AF
• All Cards+Unlock Bonus Games
  E9D3BCAA 7EBF
  FF979B96 9F82

Have Item Codes

• Dungbomb
  2D08CB97 3F90
• Stink Pellet
  AD9CDB97 3F90
• Luminous Balloon
  2F084B37 3F80
• Wiggenweld Potion
  6D23CB95 1B14
• Poison Antidote
  6F234B35 1B04
• Girding Potion
  2D28CB95 3B14

Flying Mode Codes

• Infinite Boost
  633322D2 C30A
• Stop Timer
  73034370 078E
  42230172 804A