Beaker is one of the Muppets of the Muppet Show. He is the poor assistant of Dr. Bunsen Honeydew. He mostly appeared in Muppet Labs sketches of the Muppet Show. Whenever Dr. Bunsen's experiments start to go bad, Beaker has been the recurring victim, mostly blown up and deflated. He only speaks in a high-pitched "mee-mee-mee" noise.

Towards the end of The Muppet Movie, Beaker and his famed doctor are first chronologically introduced to Kermit the Frog when they are about to demonstrate the instra-grow pills.

In another one of his movie roles, Beaker appeared in The Great Muppet Caper to help foil the villainous robber Nicky Holiday despite another of his accidents while trying to pry open the window.

In the Halloween episode of WWE he's the related cousin of Sheamus who came to his defense when he's bullied by Christian.

He appears in Ralph Breaks the Internet.

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