Mad Cow Denise is the main antagonist of the story arc Mad Cow Denise in the Teenage Mutant Hero Turtles comic strip. She is an anthropomoprhic robot cow, who is created by Krang.
History[]
Krang becomes frustrated with Shredder's constant failure to defeat the Hero Turtles. Feeling that the Turtles' biggest weakness is their curiousity, he designs a robot cow he calls "Mad Cow Denise", and he packs her into a coffin. Bebop and Rocksteady take a microplane and drop the coffin into a river in front of the Turtles. The Turtles pull out the coffin and after opening it, become emanored with the occupant. Pretending to be friendly, she has them follow her until Krang has her transport them to Dimension X. The Turtles are also attacked by Dimension X locals, as well as a pig-like humanoid biker, who transforms into a full-on pig anthropomorph, Mad Pig Pete.
Pete grabs Leonardo and takes him through a time warp, where Denise has him hypnotize Leo. Leo returns to his brothers, now under Denise's control so that he can curry their favor and command them, as leader, to comply with her desires. Denise rejoins them and asks them if they want to take a trip; the other Turtles understandably thinks it's a stupid idea, but Leo tells them as leader, they have to do what they say, and he says they're going. Denise takes them to the Land of Stone, then says that she has to "powder her nose", taking off in her shuttle. Leo insist they "go exploring" and begins walking, leaving the others with no choice but to follow. They come across giant stone statues of soldiers - the Stone Warriors - which come to life and attack. Leo instructs them to attack head-on, but the other Turtles think he's lost his mind and crush the Stone Warriors by rolling giant pillars at them.
Leo gets angry at his brothers for disobeying his orders despite the fact that charging in and fighting alone would have gotten them killed. He attacks Raphael, cutting a part of his bandana with his katana, and brands his brother a traitor. The two fight, with Leo cutting even more of Raph's bandana, but once he's knocked to the ground with a kick, Leo comes to his senses and tells them that Denise and Pete brainwashed him. Raphael angrily insists they go get revenge, but Leo points out that they're still stuck in the Land of Stone.
They then happen to see Bebop and Rocksteady cruising by in their microplane, and pretend to be knocked out or dead, lying motionless for the two goons to investigate. They jump Bebop and Rocksteady and tie them to the front of the vehicle, and after they locate Denise's shuttle, they flip the autopilot on to send them away.
The Turtles encounter Denise and go to take her to task, but she suddenly splits into eight copies. The copies are all illusions, though, and the real Denise sits comfortably in the shuttle, watching them make fools of themselves on a monitor. Krang radios Denise to stop toying with them, and she sends Pete back out on his bike to attack. Pete rides toward Leo brandishing a Sword of Flame, but Leo just stands there. At the last minute, Leo hops out of the way, sending Pete over a cliff, where the mechanical villain is shattered on impact.
A furious Denise emerges to attack the Turtles with lasers from her hands. Michaelangelo, finally fed up with the days events, swipes Donatello's bō from him and smashes Denise to pieces with it.
Shredder chastizes Krang's failure and accidentally bumps a button that returns the Turtles home. Shredder and Krang continue to argue about who's at fault in this endeavor.