Wingnut is an evil alien bat who appeared in the 1987 cartoon episode Zach and the Alien Invaders disguised as "Sergeant Rambo". Wingnut and Screwloose were from the planet Flagenon and they attempted to turn the planet's children into mindless zombies to invade Earth.
Zach's frustrated parents enroll the child in the Teen-Hut Military Academy to try and straighten him out, since he seems to see alien invaders in everything. However, shortly after enrollment, Zach discovers that his fellow cadets are zombies thanks to two aliens: Wingnut and Screwloose, who are disguised as Colonel Clout and Sergeant Rambo. Wingnut and Screwloose plan to conquer Earth using their "Mind Changer" on the young cadets.
The pair's plot is eventually defeated by Zach, Donatello and Michelangelo when Zach uses his Turtle-Com to overload the power of the "Mind Changer", forcing the two to flee the Earth.
Trivia[]
Although an enemy in the TV show, he and Screwloose were on the Turtles' side in the Archie continuity and in the action figure collection.