|This needs a stretch. (Feel to remove when satisfied of completion.)|
Needed: Physical appearance.
Uncle Happytime was Shaggy Rogers in disguise, pretending to be a clown/TV host.
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Scooby-Doo, Where Are You!
Shaggy and Scooby-Doo hid behind the back of a TV set, from the Ghost of Mr. Hyde. When he failed to find them, he switched on the TV, where the duo tried to dupe the ghost, by acting out a variety of different roles inside the TV; one of them was Shaggy as a clown, who introduced the King of the Wild Blue Yonder (Scooby).