The following are known Action Replay Codes for Star Wars Episode III: Revenge of the Sith 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
2e90c7d7
4deb233e
f6c0af3a
958e1f28

Infinite Health
ed9376e8
720cf4ea

Infinite Force Power
ca05533b
b6f0c74c

Infinite Fury
2309d6ed
989c31fa

Infinite Lives
d44f26d0
47bd51ba

Infinite Upgrade Points
7e261d67
c4fe1699