Soon afterward, the citizens had enough energy to escape the Molemen's attack and the Army had the strength to fight. King Mange was eventually defeated and arrested. Overcat Appearances: Underdog vs. Overcat Overcat (voiced by Allen Swift) is a giant anthropomorphic cat who was once the infamous ruler of the planet Felina. He is a bully, very arrogant and also has all of Underdog's powers. One day on Felina, the milk wells ran dry, so Overcat stole the cows from the Earth, kidnapped Sweet Polly Purebred and forced her to milk the cows so the giant cats of Felina can have a lifetime supply of milk. After Underdog rescued Polly and the cows, Overcat challenged Underdog to a winner-take-all fight. Unless Underdog fought Overcat, the giant cats of Felina would destroy the Earth. As Underdog fought Overcat, it appeared Overcat had the upper-hand, but due to Overcat's size and lack of speed, Underdog came out the victor. Underdog promised the giant cats of Felina to give them milk growing from coconut trees if the giant cats banished Overcat from Felina and let the other worlds live as they pleased. Underdog carried out the promise and all the cats were happy, because with the coconut trees, the cats will not run out of milk. After being banished from Felina, Overcat swore he would find another planet to conquer, train harder to become stronger and one day return to Earth to wipe out Underdog. Despite this, Overcat was never seen in the series again afterwards. Slippery Eel (a.k.a. The Electric Eel) Appearances: A New Villain, The Vacuum Gun Slippery Eel is one of the world's most dangerous criminals. He got the name The Electric Eel after he was electrified by the gates of the prison's electric fence while he was trying to escape. After being electrified, he gained the power to control electricity. Electric Eel was the only villain who ever actually defeated Underdog, using his electrical powers and apparently killing Underdog. However, before he "died", Underdog requested that he not be thrown into the lake. Eel, being the villain that he was, naturally decided to throw Underdog into the lake – which drained the electricity from Underdog's body and restored him to "life", whereupon he polished off Eel and his gang. Eel was then confined in a glass prison cell. In "The Vacuum Gun," Electric Eel and his gang were recruited