Ben 10: Alien Force
Helen and Manny use Gwen’s powers to call on Ben’s team to help deal with a dangerous foe in the Null Void: D’Void. Ben goes in alone, with Kevin and Gwen waiting on the other side to bring him back. Once inside, Ben is shocked to learn that “D’Void” is really Dr. Animo, who has taken control of the Null Guardians and enslaved the inhabitants of the Null Void. Ben later encounters Grandpa Max, who was transported to the Null Void in “Max Out” and has been leading a resistance movement under the name of “The Wrench”.