Alien X

"Surprise!" - Alien X in Universe vs. Tennyson

 Alien X is a Celestialsapien from the Forge of Creation. He first appeared in X = Ben + 2 where he stopped a dam from flooding, Ben then spends most of the episode negotiating with Bellicus and Serena. He reappeared in The Forge of Creation trying to convince Bellicus and Serena to locate the Forge of Creation before Ultimate Aggregor does, before Professor Paradox intervenes and reverts him back to normal. Alien X was then used in the Omniverse episode So Long, and Thanks for All the Smoothies where he created a near-identical copy of the universe, as the old one was destroyed by the Anihilaarg. Alien X is voiced by Yuri Lowenthal.

Appearance

 Alien X is a humanoid alien with stars covering his black cosmic body with white highlights. He has two green eyes and three horns on top of his head. In Omniverse, Alien X is now more muscular, has a bigger chin and his horns are smaller. The Omnitrix/Ultimatrix is located on his chest.

Alien X in Ben 10: Alien Force and Ben 10: Ultimate Alien

Powers and Abilities

 Alien X has omnipotence, the ability to do literally anything. He can warp time, space and reality and make anyone do anything. He is even able to create new universes. Alien X is capable of light-speed flight, changing size and shape, as well as duplicate.

Weaknesses

Any action Alien X wishes to do, including reverting back to normal, all three of his personalities must agree to do so. This can be pretty tough task, as Bellicus and Serena are hard to negotiate with, however in Omniverse, Ben is shown to be better at convincing them. Alien X's powers can be absorbed by the likes of Darkstar and Aggregor.

Other Celestialsapiens can harm Alien X, such as Galactic Gladiator.

Appearances

Alien Force

• X = Ben + 2 (first appearance)

Ultimate Alien

• The Forge of Creation 
• The Ultimate  Enemy: Part 2 (flashback, cameo) 

Omniverse

• So Long, and Thanks for All the Smoothies
• Universe vs. Tennyson
• Weapon XI: Part 1
• A New Dawn (cameo, by both Skurd and Ben)