Weird Girl's experiment takes a wrong turn when her beloved cat, Mr. Whiskers, accidently turns into a Vampire Cat due to having a dead bat in his mouth when struck by lightning. Complete with huge bat wings, two enormous fangs and darkend fur, the bat's violent side takes complete control over the once gentle Mr. Whiskers mutating and leaving no trace of him left and flies menacingly in the sky.The Vampire Cat is the true main antagonist.
It was eventually killed when a wooden stick impaled it inside a burning windmill during the climax of the film.
- Since the other monsters are meant to bare a resemblence to the original Universal Movie monsters, the Vampire Cat is meant to represent Count Dracula from Dracula .
- Sparky and the Vampire Cat's final confontation at the end may represent the heated rivalry of Boris Karloff and Bela Lugosi, as well as the heavily thought upon concept of Dracula VS. Frankenstein.
- Unlike the other monsters, the Vampire Cat was not ressurected from a dead animal. Like the Sea Creatures, the Vampire Cat was mutated with the use of lightning and (in the Vampire Cat's case) a cat in contact with a dead bat.
- The Vampire Cat kidnapping Elsa may draw parallel to Winona Ryder's portrayal of Mina Harker in Bram Stoker's Dracula .
- He was the one who broke Mr Burgermeister's flamingo.
- He is the last animal to die in the film.
- Like many of the other animals/creatures in the film, the Vampire Cat is voiced by Dee Bradley Baker.
- Due to Mr. Whisker's almost complete mindless nature, The Vampire Bat easily took over him as if it found a new body.
- In the final confrontation the Vampire Cat is impaled through the chest with a wooden stick. The most well known method of killing a vampire was by driving a wooden stake through it's heart.
The Vampire Cat resembles a mammoth-hunting predator,the Sabretooth cat (Smilodon fatalis).