Skippy the Evil Wonder Puppet is a minor villain. He has never been seen in person and he was mentioned in Humiliation 101, Jenny spoke to him on the phone, begging him to come to the school and cause havoc so Nora Wakeman wouldn't give an embarrassing lecture about her. Skippy was also mentioned in No Harmony with Melody, when Jenny told Tuck that Brad was going out with the daughter of an evil villain and Skippy was one of the few villains Tuck thought. We get a vision of him in that episode but other then that he is an unseen character.
Skippy is one of two puppet villains, the other being Lil Acorn, except Acorn was a string puppet, Skippy was a hand puppet.