Andy the Armadillo

From Muppet Wiki

Andy the Armadillo was the guest star on The Muppet Show in the book Two for the Show. He had to have a walk and had to have his dressing room fixed (both were on the Muppets' list of things to do). He was also meant to appear in a closing production of "Jack and the Beanstalk", but his bouncing was too much, and Kermit the Frog soon fired him before the show was over.