The following are known Action Replay Codes for GT Advance 2: Rally Racing 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
45a7ce00
562265c4
888cd31b
0a2b363e

Always Turbo Boost
a8516285
e3f6681c

Infinite Time: License
d9e7c730
12292962
7a938128
0effbc82