Eon

In the film Ben 10: Race Against Time, the alien Eon (played by Christien Anholt), a Chronian from the once beautiful Chronia, uses the Omnitrix to turn Ben into a younger version of himself, due to the fact that the Hands of Armageddon needed the energy of a young Chronian to activate. He also deactivated the failsafe so his DNA would completely overtake Ben's personality, essentially changing Ben into a clone of himself. As Eon, Ben activates the Hands of Armageddon, but returns to normal after Gwen manages to reach the Ben inside Eon. Like the original Eon the Omnitrix clone has vast time manipulation powers, though Ben exhibits little of them. Later on, Ben helps Grandpa Max shut down the Hands of Armageddon and end the invasion, though Eon attacks later on.