The following are known Action Replay Codes for Yu-Gi-Oh! The Sacred Cards 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
b6910665
f50859cd
907c1e9f
9eabdfc5

Infinite LP
a4a474fe
2db33083

Opponents LP
4adda2bd
73b88d42

Infinite Domino
28d449e5
5f7333bb

Have All Cards
cf98f00b
971bec29
07ce302d
5a6fc17d