If you thought all dolphins were friendly, think again. This master enemy, Doctor Blowhole, is all evil and he has it out for Skipper & Co. BIG TIME.
Once Upon a Penguin
He may not be an enemy anymore, but Max the cat wasn't always chummy with the penguins. In fact, this hungry stray wanted to eat them at first sight!
Big Body, Evil Brain
Dude! Julien isn't the only king at the zoo. Deep in the sewers lives an army of ferocious rats, led by the tall and awesomely-muscular Rat King.
Don't let those big green eyes fool you! When this Hoboken native stayed at the Central Park Zoo, he was quite the New Jersey nightmare!
Red is for Danger
Although Skipper believed the Red Squirrel to be all make-believe, he soon learned that this acorn-obsessed villain was all too real.
Meet one of Dr. Blowhole's many evil inventions, Chrome Claw! This crustracean warrior is no match to Skipper's keen commando prowess.
The only thing worse than one icky rat is a an entire brigade of them. Soldiers, evacuate!
Not only are the Vesuvius boys identical twins, but they're equally TERRIBLE! We're not sure what's worse- them or rotten, spoiled milk. :/
Bye Bye Birdie
Whoever coined the phrase 'bird brain' hadn't met Vans. Skipper's long time foe is a highly intelligent puffin with great hand-to-hand combat skills.
Private's adorable Lunacorn became The Destroyer of Worlds' target, but lucky for Private's prized toy, good always triumphs over evil!