He is created by The Awesome Jack. Head Horns is a humaniod, blue alien.
A darken blue-gray figure with a bowl-like figure in it's head.
In Omniverse, his color scheme has lightened and he is not chubby any more. The omnitrix symbol is moved to his hand. He loses a jawline and remains only a chin. He lost his outfit and gained a pair of pantss and weird markings on his body.
He can shot a giant hyper beam from his liquid brain and has projectile fangs. He is extremely durable, withstanding several punches from a god without going unconscious. He can ram into things with his horns by running with super speed.
Like Eatle he ha a blind spot. Also he can't turn when he is ramming into things so he has to straight forward until he crashes into something.