Diamondhead

Diamondhead was one of Ben's original aliens. He is a Petrosapien. He is from the planet Petropia. Diamondhead (voiced by Jim Ward in the first series, Daran Norris in the live-action movie, Dee Bradley Baker in the second series)He has the power to shoot crystals. He is also made of diamonds.

Alien Force
He appeared in Vengance of Vilagx Part 2 after Vilagx crushed Chromastone. Then he came back to life as Diamondhead, with still some Chromastone in him. He appeared again Single-Handed.

Race Against Time
He appeared in Race Against Time fighting Eon.