The following are known Action Replay Codes for Dokapon: Monster Hunter 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
a1cfc61c
cd2347e2
5a99ce52
44a55508

Monsters In Album (Code 1)
11ffd93e
0ee45c5f

Monsters In Album (Code 2)
6cbea0af
32db6d5a
a34f2fe5
9453d7ce
81023c1c
7bb9aa98
84902c06
b34518e7
26071d0e
235a9d0c
de7e6d6c
af70a95f

Max Gold
6e4504ab
74a1f7c3

Max Level
61aa8ac7
4b40f69d

Max AT
04f43833
d93a4102

Max DF
7ab76b23
61784e38

Max SP
4ac3f569
3b40ed7c

Infinite HP
214658a7
46b4ffc6
4fcd8c1a
a04ab7b3

1 Hit Enemy Kills
960303e4
d49dcec9