Ultimate Alien X, Ben 10 List Wiki

Ultimate Alien X was the Ultimatrix's Ultimate Celestialsapien who doesn't exist. When asked if Ultimate Alien X is weaker than its regular version due to a mutation, Derrick J. Wyatt said that would be a dumb idea.

Ben 10: Ultimate Alien (TV Series 2010–2012) - Episode list - IMDb

Ultimate Alien X (Ben 10 Omniverse: Cosmic Destruction), Ben 10 Fan Fiction Wiki

Alien X, Ben 10 Omniverse Wiki

Gookinetic Shapeshifting, Superpower Wiki, FANDOM powered by Wikia

Ben 10: Destroy All Aliens - Wikipedia

Ultimate Alien X (Aaron), Ben 10 Fan Fiction Wiki

Alien Z, Ben 10 List Wiki

FrankenArms, Ben 10 List Wiki

Omnitrix, Antitrix and the Ultimatrix. updated wiki page, with corrections, a list of species with edited pictures of ben's transformations and new lore : r/Ben10

Alien X, Character Level Wiki

Ghostmutt, Ben 10 List Wiki, Fandom

Alien X (Mad Timeline), Ben 10 List Wiki

Gwen Tennyson - Wikipedia

Big Chill, Ben 10 List Wiki, Fandom