The following are known Action Replay Codes for Duke Nukem Advance 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
352f1908
5ea12ed4
5fe47419
7f72d6e7

Infinite Health
255b98eb
da251496

Have All Weapons
d95d0ff3
7faa8fa9

Infinite Ammo: Handguns
8944e935
8dccd014

Infinite Ammo: Shotguns
0e66a593
ca8174a1

Infinite Ammo: MP5
765a50cd
f4e7e2a2

Infinite Ammo: Rocket Launcher
8341349b
37a81e6e

Infinite Ammo: Pipe Bombs
1054cfa2
9d4e452e

Infinite Ammo: Freeze Gun
925e636d
5f6fd058

No Reload Handguns
34f9e727
004d7457

Have All Keycards
09a62856
a36c62be