The following are known Action Replay Codes for LEGO Bionicle 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
2c64f305
cb943272
0973a17f
113ae5ce

Infinite Health
8dae3fed
01ff9516

Infinite Coconuts
64946fd7
154c5ad7

Infinite Rocks
835532ce
e7291aa7

Infinite Exploding Coco
a2719d80
b8e34bfe