The following are known Code Breaker Codes for Advance Guardian Heroes on Nintendo Game Boy Advance (GBA).

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

• Master Code – Must Be On
  0000D1E9 000A
  100D8F94 0007
• Infinite HP
  8201509E 03E7
• Infinite MP
  820150A0 03E7
• Infinite Anger Gauge
  320150A3 0001
• Infinite/Max Points
  820150E4 423F
  820150E6 000F
• Infinite Devil Mode (Upon Activation)
  320150E9 00FF
• Max Stats
  8201514A FFFF
  8201514C FFFF
  8201514E FFFF
  82015150 00FF
  Note: This won’t appear on the stats screen, but your performance will.
• Unlock All Characters
  420001CC 0101
  0000000B 0002
• Unlock Time Attack/Endless Modes
  320001F6 007F
• Play In Japanese Language
  320001F7 0003
• Play In English Language
  320001F7 0000
• Infinite Soul Shards
  8201A900 FFFF
• Infinite Anger Points
  820150A2 0064