From Muppet Wiki

Lothar is a dragon-like monster who works for Cosmo Scam in the 1970 special The Great Santa Claus Switch.

Lothar later made an appearance on The Dick Cavett Show, and also appeared in the audience of the wrestling match in The Muppet Show: Sex and Violence and in The Muppet Show episode 217 and 324 where he was refurbished with different eyes and fuzzier purple skin.

See also

• Lothar the Grouch