Zs’Skayr

Ghostfreak is a ghost-like alien who was trapped in the Omnitrix for centuries.

He first made his appearence in episode `Freaked out'. That was when Gwen was trying to enter a new school. Ghostfreak's weakness is sunlight and only can resist it when he possesses someone. His main objective is to merger with Ben to get the power of the omnitrix which will make him invincible.

He has 3 minions, the Mummy, Victor and the Wolf. Ben has 3 of their DNA's signatures which made Ben even more powerful.