Ben 10/Generator Rex: Heroes United

"Ben 10 / Generator Rex: Heroes United"
Ben 10: Ultimate Alien and Generator Rex episode
Episode no. Season 2 (Ben 10: Ultimate Alien), 3 (Generator Rex)
Episode 22-23 (Ben 10: Ultimate Alien) 3-4 (Generator Rex)
Directed by Chris Graham
Kenji Ono
Written by Man of Action
Production code 694-043
Original air date November 25, 2011[1]
Running time 43 minutes, 54 seconds
Guest appearance(s)

Michael Emerson as Alpha

"Ben 10 / Generator: Rex: Heroes United" is a crossover special between Ben 10: Ultimate Alien and Generator Rex. Taking the form of an extended episode of Ben 10: Ultimate Alien and Generator Rex, the crossover was written by Man of Action, the creators of both shows.[2] Heroes United aired on November 25, 2011 on Cartoon Network,[1] taking up a one-hour time block. In a guest appearance, Michael Emerson voices the main antagonist, Nanite Alpha.

As a special event, it premiered at New York Comic Con 2011.[3] Heroes United was universally acclaimed by fans of both of series, and has hit the top 100 on iTunes.[4]

This special is the second Cartoon Network crossover after the 2007 crossover special, The Grim Adventures of the KND.


A mysterious rift begins to open in the skies of Manhattan. Meanwhile, former agent of peacekeeping organization, "Providence", Rex Salazar is sparring against fellow agent, Agent Six, while musing about his need for a theme song, before getting the alert about the rift. Providence appears on the scene to stop the rift, but are unable to do anything before Rex arrives with Six and Bobo. Doctor Holiday, scientist and love interest of Agent Six, then gets a scan that shows something is coming through the rift, and Rex finds himself (unknowingly) fighting against Ben Tennyson, in the form of Humungousaur.[5] During their skirmish, a strange metallic creature also appears and heads into the city, with Bobo and Six on its trail. Ben switches to Rath as Rex continues to try curing him; an annoyed Ben demands Rex stop as he doesn't even know what an EVO is. Changing back to human form, Ben is shocked that no one has heard of him despite being a celebrity. Then, Six appears with the creature, which self-destructs and renders him comatose, leaving Rex mortified and angered at Ben.

At Rex's hideout, Ben is locked up in a containment unit,[6] while Doctor Holiday explains that the creature was nanite in origin, but somehow completely different from an EVO. Ben offers help but is denied, and escapes into the night as Big Chill. Rex chases after Ben and both confronted by Caesar, who explains the creature's origin, saying that he created the creature (named "Alpha") as a means of manufacturing nanites that could adapt for any scientific need, but it became rogue as it developed sentience and tried to possess human bodies due to its inability to hold a physical form within a machine, forcing Caesar to banish it to another dimension. However, Ben reveals that Caesar actually sent Alpha into the Null Void, a prison dimension for intergalactic criminals that the Plumbers capture, allowing Alpha to obtain a physical form within an alien and find its way back to Manhattan. Alpha invades to absorb EVOs for their nanites, hoping to gain control of Rex's as it knows he holds the key to it obtaining perfection.

Back at base Ben and Rex explain each other's origins, as White Knight reveals that Alpha has gone to the Bug Jar, which is full of EVOs for it to absorb. Rex, White Knight, and Ben arrive, only to find themselves against the nearly invincible Alpha, which begins to attack to take control of Rex's Omega Nanite. Ben fights as XLR8 and Fourarms. During the battle, Ben gains the form of Shocksquatch,[7] but then temporarily loses his powers when Alpha copies the Ultimatrix and takes on Nanite powered versions of Heatblast, Fourarms, and Humungousaur. After a tough battle, Rex is able to disable Alpha's imitation Omnitrix powers, but is ensnared and robbed of his Omega Nanite, leading to Nanite Alpha to transform into a colossal being calling itself Alpha-Omega; the beginning and the end. As the now nearly unstoppable Alpha-Omega rampages, Rex has doubts about himself now that most of his builds are gone. Ben however comes up with a plan, and transforms into Upgrade and merges with Rex. The duo then take on the Alpha-Omega, weakening it enough for Rex to finally condense Alpha into a sphere of matter that weighs several tons. As Alpha was being condensed, Caesar appears and extracts the Omega Nanite. Attempting to dispose of Alpha, Caesar then opens a rift for Ben, who changes into Upchuck and devours the compacted Alpha as he heads back to his world. Rex returns to base, one last time, to find himself with a revived Agent Six. Caesar injects the Omega Nanite into Rex, as Alpha, now in the Null Void, begins to stir within its prison of matter, meaning it is not over yet.


Heroes United is the double-length third and fourth episodes of Generator Rex's third season.[2] As it is set in Generator Rex's fictional universe and depicts Ben crossing over into it from his own world, Ben, his various aliens and other characters from Ben 10: Ultimate Alien appear in Generator Rex's animation style when in Rex's universe. Other main characters of Ultimate Alien such as Gwen Tennyson and Kevin Levin do not make a full physical appearance (but they are drawn in generator rex style),[8] only to be seen in a flashback featuring recurring character Grandpa Max.


Only one comic is based on Ben 10 / Generator Rex: Heroes United and it's named as Hero Times Two.


See also


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