Ben 10: Ultimate Alien: American Animated TV Series

Ben 10: Ultimate Alien is an American animated television series - the third incarnation of Cartoon Network's Ben 10 franchise. It was slated to premiere after the series finale of Ben 10: Alien Force, which was on March 26, 2010. The show itself aired on April 23, 2010 in the US and in the UK and Latin America on October 10, 2010 at 10am (10/10/10)/ Before the title was announced, "Ultimate Alien" went under the working title of "Ben 10: Evolution".
In Canada, the series started airing on September 12, 2010, on Teletoon.
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").
In the premiere episode, "Fame", a young ten-year-old fan named Jimmy Jones deduces Ben's secret identity and reveals it to the world. Ben becomes an overnight celebrity, hailed by kids as a hero but distrusted by most adults as a possible threat. With Gwen, Kevin, Julie and Grandpa Max still at his side, Ben continues to battle alien threats to the galaxy including finding five aliens that were attacked by a villain named Agreggor. After Agreggor captured and fused with all five aliens, he began searching for the Map of Infinity.
Later Kevin becomes once again a main antagonist to the Ben 10 series after he is forced to absorb energy from the Ultimatrix and goes insane with power, but is shown that he does still have a human heart and still does care and that he has not gone completely insane. Kevin is eventually returned to normal and Aggreggor's actions are reversed.