Ben 10/Generator Rex: Heroes United (2011)

Ben 10/Generator: Rex: Heroes United is a crossover special between Ben 10: Ultimate Alien and Generator Rex. The crossover was written by Man of Action and aired on November 25, 2011 on Cartoon Network.

Voice Cast

 * Daryl Sabara - Rex
 * Yuri Lowenthal - Ben Tennyson
 * Wally Kurth - Agent Six
 * Grey DeLisle - Dr. Holiday
 * John DiMaggio - Bobo Haha
 * J.K. Simmons - White Knight
 * Michael Emerson - Nanite Alpha
 * Jennifer Hale - Black Knight
 * Freddy Rodriguez - Caesar

Additional Voices

 * Dee Bradley Baker - Big Chill, Diamondhead, Four Arms, Humungousaur, Lodestar, Upchuck
 * Grey DeLisle
 * John DiMaggio - Rath
 * David Kaye - Shocksquatch
 * Yuri Lowenthal - Upgrade