The Mummy was summoned by Butters Stotch at the Denver Museum of Nature and Science. He summons the mummy by stamping a stamp in his book after being told not to. It later breaks into his room, hugs him, and gives him a Fitbit. Then Butters tells the mummy he already has a Fitbit which upsets the mummy causing it to kill 5 people. During an assembly at the school, the mummy breaks in and throws 3 children.
The Mummy is an undead gray-colored zombie, wrapped completely with bandages that look a bit frayed and dirty except for its eyes.