The Genie is a creature who appears in the Fraggle Rock episode "Wembley and the Mean Genie." He tries to convince Wembley that he can do whatever he wants, and no one can stand in his way. He eventually hypnotizes the whole rock into believing just that.
The Encyclopedia Fragglia lists the Genie as coming from "a broken bottle" (a fact that enlists a sympathetic sigh from Gobo). It also lists the Genie's good deeds as: stealing, lying and breaking things. His bad deeds are too terrible to mention.