The following are known Action Replay Codes for Mario Party 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
c01336cb
10e4d6bb
4efc2e69
a3fcfd18

Infinite Mushrooms
10a7728f
3d2280b3
5273bd29
75f65ef8