Ben 10: Ultimate Alien -

Following the battle with Aggregor, Kevin Levin mutates into a monstrous form after absorbing the Ultimatrix's energy, forcing Ben to make a dark choice about whether he must kill his best friend to save the world.

is the third installment in the Ben 10 franchise, serving as the direct sequel to Ben 10: Alien Force . Airing from 2010 to 2012, it follows a 16-year-old Ben Tennyson as he navigates worldwide fame after his secret identity is outed. Armed with the Ultimatrix , Ben can now "evolve" his aliens into more powerful Ultimate Forms to combat high-stakes intergalactic threats. Core Premise and Plot Arcs Ben 10: Ultimate Alien

Ben must stop Aggregor, a rogue Osmosian, from absorbing five powerful aliens from the Andromeda Galaxy to reach the "Ultimate Prize" in the Forge of Creation. Following the battle with Aggregor, Kevin Levin mutates