The following are known Action Replay Codes for Harry Potter and the Sorcerer’s Stone 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
76ae9b18
01693b3f
1e0c9d99
2723ba08

Invincibility
bb07036e
27d78e95

Infinite Stamina (Code 1)
f4e06e7c
62242e4f

Infinite Stamina (Code 2)
a8e07810
5e3863bf