The following are known Action Replay Codes for Harry Potter and the Chamber of Secrets on Nintendo Game Boy Advance (GBA).

These are Action Replay Version 3 (V3) Codes.

The codes should work with the region specified but may work for other regions as well.

(m)
76ae9b18
01693b3f
1e0c9d99
2723ba08

Invincibility
925bd9c3
5290379a

Inf Stamina
f4e06e7c
62242e4f
a8e07810
5e3863bf

Walk Through Walls
d6645d6b
c7874e6f
a05a144c
078b0074
f3db1d6e
4b10ab6a
a05a144c
078b0074

AR butt for flipendo
ca487969
4e480332
a05a144c
078b0074