Nightmarish Alien

The Nightmarish Alien Prisoner was one of the alien prisoners on Incarcecon in Ben 10: Secret of The Omnitrix.

History
He was seen when Tetrax was explaining there are no rules on Incarcecon. He was seen when Gwen was exposed to everyone when Ben turned into Perk Upchuck. In Omniverse he is a member of Psyphon's Crew.

Appearance
He

Ben 10

 * Ben 10: Secret of The Omnitrix (first appearance)

Ben 10: Omniverse

 * Mud is Thicker than Water (first re-appearance)