Generator Ben Part 1 is the thirty-third episode of Ben 10: Ultimate Alien. And a crossover with Generator Rex.

Air Date

April 1, 2011


After Ben and the gang encounter Atomic Dynamo, they got send into the future of Generator Rex. Where Ben asks Generator Rex to help him stop Vilgax from breaking Van Kleiss from Dr. Rylander's reactor.


  • Ben Tennyson
  • Gwen Tennyson
  • Kevin Levin
  • Elena Validus
  • Julie Yamamoto
  • Ship
  • Alan Albright
  • Cooper Daniels
  • Helen Wheels
  • Manny Armstrong
  • Pierce
  • Kai Green
  • Mariella
  • Generator Rex
  • Bobo Haha
  • Agent Six
  • Mrs. Holiday


  • Atomic Dynamo
  • Vilgax
  • Psyphon
  • The Pack:
  1. Biowulf
  2. Skalamander
  • Argit (cameo)

Aliens Used

  • Rath
  • Humongousaur/Ultimate Humongousaur
  • Heatblast
  • Chromastone
  • Jetray
  • Fourarms

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