History WesternAnimation / Ben10GeneratorRexHeroesUnited

A mysterious rift begins to open in the skies of Manhattan. Meanwhile, Rex is sparring against, [[TheStoic Agent Six]]. While musing about his need for a "Theme song" before getting the alert about a mysterious rift. Providence appears on the scene to stop the rift, but are unable to do anything before Rex arrives with Six and [[DeadpanSnarker Bobo]]. [[HotScientist Doctor Holiday]], then gets a scan that shows something is coming through the rift, and Rex finds himself (unknowingly) fighting against, [[{{WesternAnimation/Ben10}} Ben Tennyson]], in the form as Humongousaur. During their skirmish, a strange metallic creature also appears and heads into the city, with Bobo and Six on it's trail. Ben is finally defeated by Rex, when trying to protect bystanders, revealing his true human form. Then, Six appears with the creature, which self-destructs and renders him comatose, leaving Rex mortified and angry at Ben.

* LetsYouAndHimFight: Ben thinks Rex is an alien, Rex thinks Ben's an EVO, you get the picture.

* ActionDuo: guess who ?

** This actually creates some FridgeLogic since, unlike the [[{{Ben10}} original]] [[RunningGag series]], [[WordOfGod Dwayne]] [[DwayneMcDuffie McDuffie]] stated that Ben had managed to unlock the feature which gives him instance knowledge of the current aliens powers (which is why the gag isn't used in the [[Ben10AlienForce modern]] [[Ben10UltimateAlien series]])

This special is Canon to both, and even introduced a new alien for Ben, Shocksquatch, that was then used in the new series Ben10Omniverse.

* FireForgedFriends

* HeterosexualLifePartners: Ben and Rex, by the end of the episode.
** MotifMerger: In the beginning, their respective logos are fused, with the Omnitrix symbol forming the hub of Rex's gear symbol. See again when Fused!Rex builds his Upgrade-enhanced PowerFist.

* HowDoIShotWeb: Ben gets [[ShockAndAwe Shocksquatch]] for the first time, and [[RunningGag per usual]] doesn't know what he does.

* CompositeCharacter: Alpha is effetively an EVO, and then, at the climax, hacks the Ultimatrix, allowing him to turn into some of Ben's aliens.

** [[spoiler:When he hacks the Ultimatrix, he is able to steal its abilities and turn into Evos giant versions of Heatblast, Humongousaur and Fourarm.]]

* OneWingedAngel: Alpha does it ''several times'', ending up as [=AlphaOmega=].
* OriginStory: Ben and Rex explain theirs at the same time.

* OneWingedAngel: [=AlphaOmega=].

* CainandAbel: Rex and Cesar, to a certain extent. Also, in some twisted way, Alpha considers himself Rex's brother.

* MegaManning: Alpha manages to copy Ben's Ultimatrix, giving him versions of [[PlayingWithFire Heatblast]], [[MultiArmedAndDangerous Fourarms]] and [[EverythingsBetterWithDinosaurs Humongousaur]].

* DoesThisRemindYouOfAnything: '''Alpha:''' "The [[TheBible beginning and the end]] of all things, I am [=AlphaOmega=]!"

At Rex's hideout, Ben is locked up in a containment unit, while Doctor Holiday explains that the creature was Nanite in origin, but somehow completely different from an E.V.O. Ben offers help but is denied, escaping into the night. They are both confronted by Caesar, who explains the creature's origin. Having, created the creature, whose name is "Alpha". Saying that he created Alpha as a means of manufacturing nanites that could adapt for any scientific need, but became unstable as it developed sentience, forcing [[MadScientist Caesar]] to banish it to another dimension. 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.

!! Tropes:

** Rex's attempt at creating his own theme song in the opening uses the same tune of the original ''[[WesternAnimation/{{Ben 10}}'' series with Rex adding his own lyrics. Six admits it's kind of catchy.

* ArtShift: For Ben and his aliens. They're done in the ''GeneratorRex'' (more detailed) style. This has the effect of making Ben look older.

--> '''Holdiday:''' For the record, most scientists are not like that.

** Rex's attempt at creating his own theme song in the opening uses the same tune of the original Ben10 series with Rex adding his own lyrics. Six admits it's kind of catchy.

* IAmHeroHearMeRoar: Averted in this case. Ben doesn't do it.
* JustEatHim: How [[BigEater Upchuck!]]Ben deals with the super-heavy nanite sphere. Rex's reaction is [[CrowningMomentOfFunny priceless]]:
--> '''Rex:''' Wow. That's just...wow.

* ThemeTuneCameo: Several times, one example being when Ben transforms back to human The UltimateAlien theme plays.

** Rex's attempt at creating his own theme song in the opening uses the same theme of the original Ben10 series with Rex using his own lyrics. Six admits its kind of catchy.

An IntercontinuityCrossover between the two ManOfActionStudios series ''Ben10UltimateAlien'' and ''GeneratorRex'' that aired November 25, 2011.

* HeyItsThatVoice: All of Ben's aliens (bar [[JohnDiMaggio Rath]]) are voiced by DeeBradleyBaker, including the new guy, Shocksquatch. Alpha is voiced by Michael "[[{{Lost}} Ben Linus]][=/=][[PersonOfInterest Mr. Finch]]" Emerson.

* FusionDance: Between Rex and Upgrade!Ben.
** In the beginning, their respective logos are fused, with the Omnitrix symbol forming the hub of Rex's gear symbol. See again when Fused!Rex builds his Upgrade-enhanced PowerFist.
*** This form comes complete with a super jetpack, RocketPunch (perfect for EyeScream!), MacrossMissileMassacre, a full-on [[CoolBike rocket cycle]] and improved CoolSword.

* HeyItsThatVoice: All of Ben's aliens are voiced by DeeBradleyBaker, including the new guy, Shocksquatch. Alpha is voiced by Michael "[[{{Lost}} Ben Linus]][=/=][[PersonOfInterest Mr. Finch]]" Emerson.