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.

Atomic-X, Ben 10 Wiki

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

Alien Mode, Superpower Wiki

Ben 10 Ultimate Alien: Cosmic Destruction, Ben 10 Wiki

Ben 10 Fan Fiction - Others: Aliens by powers and abilities, Alternate versions, Army, Artifacts, Ben 10: Ultimate Alien Episodes, Blog posts, Books, in BTFF Wiki, Albedo, Alshedo, Alternate Ben

Alien X, Ben 10 Wiki

The Sentinel, Ben 10 List Wiki

Kai Green, Ben 10 Wiki, Fandom powered by Wikia

Ben 10 - Wikipedia

Ben Tennyson (Dimension 23), Ben 10 List Wiki

Ben 10 Fan Fiction - Others: Aliens by powers and abilities, Alternate versions, Army, Artifacts, Ben 10: Ultimate Alien Episodes, Blog posts, Books, in BTFF Wiki, Albedo, Alshedo, Alternate Ben

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