The following are known Action Replay Codes for Casper 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)
cae6e39d
50224f78
341c1858
60ef017a

Max Lives
b83f0d0a
8b26f548

Slo-mo on Button
dbba3a89
4cb74b94