The following are known Action Replay Codes for The Scorpion King: Sword of Osiris 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
fdea391c
82add1b6
326d4bad
b8789b76

Invincibility
d761a371
66198248

Infinite Health
7a7b8feb
4d018b40

Infinite Lives
f5f3e1a3
a320fc2f

Max Scorpions
f9b1528b
50ce7534

Always Sword
6cddd884
fc581468

Always Reaper
9639f56b
ad6ece7d

Have Red Gem
60b20410
8ba51b58

Have Fireball
b9980e98
a900815e

Have Fire Shooter
29592454
b7311a2f

Have Max Fire
e294978c
7c331a77

Have Osiris Sword
8589895f
be9c8b5e

Press AR Button: Mega Jump
2ea09984
30885560
a05a144c
078b0074