The following are known Action Replay Codes for Super Army War 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
14d0864b
80e16376
968bea48
b5cc1f30

Infinite Health
94eb0080
5bbbb2ef

Infinite Lives
cd860aaa
dee4e666

Infinite Missiles
5edfdcc5
54c4c21c

Infinite Funds
9cec7917
1c95d24e