The following are known Action Replay Codes for Harry Potter and the Goblet of Fire on Nintendo Game Boy Advance (GBA).
These codes were also known as GameShark Codes and in most cases will work on both devices.

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

Master Code – Must Be On
ed1f936c
fe156ce0
8bf5b0f9
3f36d700

Infinite Health
badf5772
1b426ca6

Infinite Beans
b3fe0ce5
91f41721