The following are known Action Replay MAX Codes for Digimon World 4 on Sony Playstation 2 (PS2).

Device Compatibility: Action Replay MAX

• Master Code – Must Be On
  UAKE-MQ3H-V6DFM
  XFQ3-VWAB-D4ZU3
• Pause to Restore HP
  685U-4932-F1N5X
  VJ0F-N06K-ZBYMF
• Pause to Restore MP
  T8DX-P2UM-TUUDJ
  RD3T-BWP7-D37R9
• Infinite Item Use
  87YG-CEX1-94FMM
  HN4D-1KB0-7RZ4U