From the Super Mario Wiki
The Goomba Mummy is a character in The Super Mario Bros. Super Show!. The Goomba Mummy has only appeared in the episode "The Ten Koopmandments". The Goomba Mummy is only seen once chasing Mario, Luigi, Toad, and Princess Toadstool through a pyramid in Pyramid Land. As its name suggests, it's a mummy Goomba that is wrapped up in bandages.
After a long period of time without the Goomba Mummy ever being seen again, an enemy called a Gritty Goomba appeared in the game Mario & Luigi: Superstar Saga, which resembles the Goomba Mummy. However, this could just be a coincidence.