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

Vinewolf, Ben 10 List Wiki

The Sentinel, Ben 10 List Wiki

Was scrolling through the crew art section of the Ben 10 wiki and : r/ Ben10

What are all Ben 10's ultimate aliens (the ones shown in the franchise), and how are they different from their original aliens? - Quora

Ball Weevil, Ben 10 List Wiki

Diamond-Snare, 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

Big Chill, Ben 10 List Wiki

Ultimate Forms, Ben 10 Wiki

Ben Tennyson - Incredible Characters Wiki

Ben 10: Ultimate Alien (Western Animation) - TV Tropes

Starbeard, Ben 10 List Wiki

I made a chart of the weaknesses of the original 10, and according to the wiki, diamondhead is strongest alien, since he has only one VERY UNCOMMON weakness : r/Ben10