Marvin Mudmaker appeared in Mopatop's Shop in the episode "Mud". He came to the shop with a new order of mud that they needed for their empty mud department. But instead of placing the mud in the mud department that Puppyduck had asked for, he spread it around the shop. He ended up reminding another customer, Mrs. Crocodile, that a swamp would need some lovely mud and was hired by her straight away.

The puppet was originally used as Tug Monster on Little Muppet Monsters.