The following are known Action Replay Codes for Pitfall: The Mayan Adventure 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
b1d642eb
5b6556b9
082b9fb6
90dff689

Infinite Health
7f0d2033
eab89037

Infinite Lives
7937cb7e
55422c5d

Infinite Continues
56167c37
2362a281

Infinite Sling Bullets
939f3b67
5b33d74c

Infinite Boomerangs
f3399356
253083fa

Press AR Button: Slow
dbba3a89
4cb74b94