Ben Tennyson falls through a wormhole and encounters Rex. The two heroes must unite against a foe that can absorb their powers.
Did You Know?
Other main characters of Ultimate Alien such as Gwen, Kevin and Grandpa Max do not make a full physical appearance but they are drawn in Generator Rex artstyle only to be seen in a flashback. See more
Have anything to say to yourself before I commence with the face stomping?
Yeah, you just made a *humongous* mistake!
References Ben 10: Ultimate Alien