The following are known Action Replay Codes for Animaniacs: The Great Edgar Hunt on Nintendo GameCube (GCN).

Master Code – Must Be On
DWRY-58M0-QVBE7
8AWG-2RDK-0CBHB

Infinite Health
67NY-KDJU-N6WQB
0JCK-CFD2-2MR0J

Max Health
1Z0U-Z3VZ-Q9M68
1KGM-0TVV-04EWB