Members of the Flying Monkeys, ready to go
The Flying Monkeys is the name of the biker gang that serves as the Wicked Witch of the West's henchmen in The Muppets' Wizard of Oz.
Formerly a rather peaceful group of "motorcycle enthusiasts," the Flying Monkeys were placed under the Witch's control when she took possession of their magic biker cap. Forced to do her bidding, the Monkeys rode their motorcycles through the skies of Oz, performing the Witch's dirty work. Once she was defeated, Dorothy returned the biker cap to Sal Minella (the only actual monkey of the group), thereby restoring the Flying Monkeys' independence.
The members of the Flying Monkeys include:
Johnny Fiama, while associated with the Monkeys, is not formally a member of the group. He and Foo-Foo appear to be with the Witch by choice and are not controlled by the magic biker cap.