The following are known Action Replay Codes for Ty the Tasmanian Tiger 2: Bush Rescue 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
8f30f9f4
a414531d
aced3a5d
fd3a8489

Infinite Health
0f40f45b
7d7fc1f6
5738cfe5
515c61cf
a702b5e4
d5dbaddb
5738cfe5
515c61cf

Infinite Lives
bebbc791
08fa1076

Max Gems
a5afcf77
933d9b4a

1 Hit Kills Bosses
1ac3bcf1
2901ebaa
8e883eff
92e9660d
7a972032
d0f02b25
78da95df
44018cb4