The following are known Action Replay Codes for Jim Henson’s The Muppets on Nintendo Game Boy / Color (GB / GBC). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

Infinite Lives
0163bcda

Infinite Health
01ffc1da

Infinite Special Move
0119c3da

Infinite Paper Plane/Drumsticks
0119c2da