The following are known Action Replay Codes for Jet Grind Radio 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
638728d2
1a0971ad
6cd29480
2191ca47

Infinite Time
ef6006d5
3c559462

Infinite Spray Cans
16725dbc
6b1ba679

Max Points
2aa8d7e7
28113ae6