The following are known Action Replay Codes for Lemony Snicket’s A Series of Unfortunate Events 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
2c70a20b
61a34c12
5ce72e02
a424b0fd

Infinite Health
84bad2c8
399cdfff

Infinite Apples
88bfd6c3
a4d37fb3

Super Jump
bf04ac2d
3d07f0b7
7f032ee8
2f2e3f54

Baby: Infinite Rolls
7518083b
fd85fca1