Brak

Brak is a supervillain in the 1966 Hanna-Barbera animated series Space Ghost, portrayed as a feline space pirate alien trying to conquer the galaxy. Brak appeared alongside his twin brother Sisto in episodes such as The Decoy and The Looters, and was also a member of the Council of Doom (A Space Ghost villain organization that originally consisted of Zorak, Moltar, Tansut, Metallus, Creature King, Black Widow and himself). In the 1990s Brak reappeared in adult-oriented Space Ghost Coast to Coast on Cartoon Network, and later became the star of its spin-off The Brak Show also on Cartoon Network. The last two incarnations of Brak changed from a genius evil supervillain into a childish simpleton. It was confirmed on Cartoon Planet that Brak is a donkey because he suffered brain damage after being thrown into a swarm of Paranamite in the Space Ghost episode The Decoy.