The Battle of the Ultimates is a battle that occured during Season 22. In this battle, Ben Tennyson was forced to fight his Ultimate Forms due to a technique used by Fabia Sheen while fused with Ren Krawler. The fight is left inconclusive due to Drago's mutation into Iron Dragonoid, but the Ultimate clones are no longer linked to Ben.
- Aliens Used: Swampfire, Humungousaur, Big Chill, Echo Echo, Spidermonkey, and Cannonbolt
Cloned Ultimate Forms
- Ultimate Swampfire
- Ultimate Humungousaur
- Ultimate Big Chill
- Ultimate Echo Echo
- Ultimate Spidermonkey
- Ultimate Cannonbolt
- Wildmutt and Ultimate Wildmutt did not appear. The reason for this is unknown.
- This is the first story event recorded on this wiki.
- This fight is a reference to The Ultimate Sacrifice episode of Ben 10: Ultimate Alien and the Ben 10: Alien Force series finale, as the Ultimate Forms become sentient and they fight their devolved forms.