Atasian

The Highbreed believe that their DNA is the purest of all alien species, and seek to clense the galaxy of lower life forms. They've traveled to Earth to exterminate mankind. Notable Highbreeds are, the Highbreed Commander and the Highbreed Leader. The Highbreed Commander that usually fights Ben, insults him by calling Ben "scum" or even "filth". Also, during a fight with Ben, Ben actually bit the Highbreed Commander causing him to insult Ben by saying that he had infected him proving that they do think their DNA is the purest of all alien race. In the episode "Max Out", he attacks Max Tennyson, only to die when Max destroys the focus of the Null Void Projector and using it as a hand grenade. Their sizes come close to the sizes of Myaxx and Vilgax. They make DNAliens do all their dirty work.