Taking place a few weeks after where Ben 10: Alien Force leaves off, Ben 10: Ultimate Alien follows the now sixteen-year-old Ben. The Omnitrix has been destroyed and Ben must learn to master the secrets of the new Ultimatrix, a gauntlet-like version of the old Omnitrix that not only gives him access to all of his original powers and abilities, but also allows him to evolve his alien forms into even stronger and even more powerful versions (called "ultimate forms") like: Ultimate Swampfire, Ultimate Spidermonkey, Ultimate Big Chill, Ultimate Humungousaur, Ultimate Cannonbolt, Ultimate Echo Echo, Ultimate Wildmutt and more. Later Ben will get seven more aliens for his Ultimatrix.