Despite Ben’s efforts, Aggregor successfully absorbs all five aliens, becoming " Ultimate Aggregor ," a virtually invincible being.
The mysterious (an ancient knight) and the Forever Knights attempt to stop the return of an extra-dimensional demon called Diagon .
Ben believes the only way to stop Kevin’s rampage is to kill him, leading to a heated conflict with Gwen, who insists there is still a way to save him.
Ben can evolve aliens like Humungousaur, Echo Echo, and Swampfire into more battle-hardened versions.
The series explores Ben's maturity and his evolving relationship with Julie, Gwen, and Kevin.
Ben 10: Ultimate Alien (known in many regions as Ben 10: Supremacía Alienígena ) follows 16-year-old Ben Tennyson as he navigates life as an international celebrity after his secret identity is exposed to the world. Armed with the , a powerful gauntlet that allows him to "evolve" his aliens into much stronger Ultimate Forms , Ben faces darker threats and deeper personal stakes than ever before. Major Story Arcs The Aggregor Arc (Season 1):
