Ben 10 Wiki
White trix.png This article belongs to Rex's Universe within the Classic Continuity
Go to the Generator Rex Wiki to learn more about Alpha

I was misguided to place my trust in a father that did not want me. I never needed him. I simply needed the energy and means to do what I have always done: evolve.

– Alpha after absorbing Rex's Omega-1 Nanite to become Alpha-Omega.

Alpha is the main villain in Ben 10/Generator Rex: Heroes United. He is an old Nanite creation of Caesar Salazar. Alpha is the counterpart of the Omega-1 Nanite.


Alpha appears to be a skinny red humanoid made of energy. His body is enveloped in a soft red glow, resembling a Naljian or an Anodite. His face is somewhat skeletal, lacking a visible lower jaw and having small fang-like projections on either side of the mouth.

After absorbing nanites from the Bug Jar, Alpha gains black armor over much of his body, which becomes bulkier and more bestial in appearance. The aura around his head intensifies into a flame-like cloud of active nanites, his face becomes more skull-like, and his shoulder armor resembles a pair of large spikes. After gaining power from the Ultimatrix, Alpha manifested a corrupted copy of the device on his right wrist.

Absorbing the Omega-1 Nanite transformed Alpha into his ultimate form, Alpha-Omega. This form was an even more monstrous version of his previous state, giving him a multi-legged lower body. His head became almost demonic in appearance, with a small crystal floating between his horns.


Alpha is a heartless, sociopathic entity, who single-mindedly seeks for his own ends, and lacks any understanding of the needs and wants of others or the moral value of others' existence. Alpha will ruthlessly and eagerly suck EVOs dry of their nanites, killing them in the process, if it will help to temporarily feed and strengthen him; although he does not kill when it won't serve his aims in a significant enough way, as he disregards the opportunity to drain unmutated lifeforms whose nanites are too weak to be of use to him. Alpha regards other nanites and/or their hosts as his siblings, and his creator Caesar as his father.

As well as being ruthless, amoral and cold, Alpha is also highly intelligent, independent, adaptive and resourceful; he was able to eventually find his way from the Null Void back to his original universe by possessing a mechanical alien host, and subsequently evaded his enemies and hunted down his prey on his own, and when his efforts to extract the Omega-1 Nanite for himself initially failed, Alpha quickly calculated a new, resourceful strategy which involved mimicking the Ultimatrix in hopes that one of its alien forms could act as a sustaining host. Alpha could also be insane and arrogant, as Alpha was contemptuous of others such as Rex, considering them unworthy hosts of nanites in comparison to himself, and upon absorbing the Omega-1 to become Alpha-Omega, he bloodthirstily began destroying everything to feed himself and set about bringing about the end of humanity.

Despite his ruthless, emotionless, amoral and arrogant behavior and motivation however, Alpha did show hints of a softer side for Caesar because of how he saw the latter as his father; going after Caesar in an almost childlike manner after returning to his original universe, and hoping that Caesar would willingly help him in his goals, although when Caesar refused to help Alpha, the latter accepted his father's rejection and decided Caesar was redundant.



Alpha was a very dangerous Nanite entity that could take over host bodies and control and absorb machines, by using the Nanites found within them. It was programmed by Caesar to think for itself so it could perform its original task: control the Nanites so they could do their job. However, Alpha's energy form was unsustainable, every mechanical body it built burnt out extremely fast.

When it tried to take a biological body, Caesar was forced to use the equivalent to a Null Void Projector to fire Alpha into what he thought was an empty pocket dimension. However, unknown to Caesar, Alpha was sent to the Null Void, a penal colony created for intergalactic criminals, where it came into contact with alien technology that utilized a dimensional equivalent to Nanites for power that it would use to return in pursuit of his "father" Caesar in order to become whole again.

Heroes United

However, something went wrong in the warp and accidentally ended up in another world where he met and fought Ben Tennyson shortly before finally returning to his world but accidentally brought Ben in it as a result. When he arrived in New York, Alpha was curious about the existence of Nanites in the humans and creatures he saw but was immediately attacked by Six before he could find out more from Caesar. The mechanical body he had acquired was immediately destroyed, severely wounding Six in the explosion as Alpha escaped in the confusion to continue his pursuit after Caesar. After Caesar refused to help him find a body that could sustain itself, Alpha instead went after Rex whose body contained an Omega-1 Nanite, potentially the only device in existence that could create a body that can sustain itself. Ben and Doctor Holiday were able to ward Alpha off, forcing it to seek an alternate source of Nanites. Alpha attacked the Bug Jar and absorbed every nanite inside.

Craving for more power, Alpha hacked and copied the Ultimatrix and gave it the power to turn into EVO versions of Ben's aliens. With this, Alpha was able to grab Rex and absorb the Omega-1 Nanite in his body converting massive amounts of matter into more Nanites. After Rex was unable to use his Omega machines, Ben used Upgrade to merge with Rex, upgrade his machines and severely damage Alpha.

Following this skirmish, Caesar arrived on the scene and used a contraption to extract the Omega-1 from Alpha. Rex took control over Alpha's Nanites and compacted them into a baseball sized ball of extremely dense matter. Upchuck took the ball and dumped it into the Null Void on his way back to his own Earth. Inside the Null Void, Alpha's prison begins to crack open.

Powers and Abilities

Alpha can control large volumes of nanites and make them do his bidding.

Alpha is able to absorb another being's nanites, killing them in the process.

Alpha can hijack any technological construct and make it his host.

Alpha is able to tamper with other technological constructs and even mimic them, as shown when he was able to make a copy of the Ultimatrix.

Alpha can regenerate, grow and alter the size of any body part instantly.

Alpha is able to fly.

Alpha is strong enough to hold back Rex's Smack Hands.

Alpha is durable enough to withstand missiles from Rex's Boogie Pack while wearing the Upgrade Suit.

Alpha can expel fire from his mouth.


Being a Nanite, Alpha can be trapped within a solid object if that objects density is high enough in order to prevent sub-molecular beings such as nanites to escape

Alpha is shown to be highly dependent on absorbing continuously other nanites. Otherwise, his material form would fall apart.




  • When he transformed into Alpha-Omega, his face looks similar to the face of Grand Zamboa, a galaxy-sized construct piloted by the main antagonist from the popular anime series Tengen Toppa Gurren Lagann.
  • He uses Godzilla's roar from the Godzilla movies multiple times.
  • Alpha's corrupted alien forms have some interesting characteristics:
    • As Heatblast, Alpha possesses the hot spots seen on the adult Heatblast transformation used by Ben 10,000. His horned face, large body, and tail also give him some similarities to the Balrog seen in The Lord of the Rings, particularly the film version.
    • As Four Arms, Alpha resembles an even more monstrous version of Kevin's Tetramand mutation with his black hair and misshapen arms.
    • As Humungousaur, Alpha looks monstrous and his skin is green, setting him apart from all other known Vaxasaurians.
Vilgax DagonLucubraConduit EdwardsRichEsotericaBioid (Original)Bioid (Alien Force)MechadroidSquid Monsters
Zs'Skayr CrüjoKuphuluLord TransylMummyViktorYenaldooshiAnur-Mirrored BenAnur-Mirrored CharmcasterAnur-Mirrored HobbleAnur-Mirrored RookMutant Pumpkins
Aggregor Aggrebots
Evil Bens EonAlbedoBad BenBenzarroEon's ServantsMad BenNega Ben
Faction Dr. PsychobosKhyberKhyber's PanuncianMalware
Rooters ServantisPhil BillingsRagnarokSwiftLeander
Mutated Kevin Kevin 11Kevin 11,000Ultimate KevinOmniverse KevinOmniverse Flashback Kevin
Incursean Empire MilleousAtteaRaffMajor GlorffLieutenant RanaSangfroidWay Bads
Forever Knights DriscollEnochPatrickUrienCyrusJoseph ChadwickConnorDagonetDr. JekyllMortonReginaldTwin KnightsSquireCoach FinnMech DragonForever NinjaSquires
Dr. Animo Mutant FrogMutant HamsterMutant ParrotLiving MammothLiving TyrannosaurusHeatbatMutant SeagullMutant SquidMutant LepidopterranMutant BatMutant Prairie DogMutant HornetDragon MenImpossibleMutant KangarooMutant SnailMutant AntMutant MosquitoMutant GiraffeTechnobugMutant ChupacabraFrankencryptidMutant Squirrel
Psyphon Bug-LiteBouncersBubble HelmetLiamGorvanMinionNightmarish AlienPiscciss Volann PrisonerPickaxe AliensSweet-Eels SparklefunkHooded AlienThunderpigTummyhead
Magic AddwaityaCharmcasterDarkstarPallorfangScrutin
Highbreed Highbreed CommanderDNAliensXenociteMizaruSimian
Vreedles MaPaOctagonRhomboidParallelogramIsosceles Right TriangleDodyPretty Boy
Bounty Hunters SixSixSevenSevenEightEightSynthroidSunderKraabVulkanus
Vengers Billy BillionsCaptain NemesisKangaroo KommandoMazumaSimonsWill Harangue
Lenopan Mr. MannMrs. MannCamille's Ex-BoyfriendMann Family's Bodyguard
Fistrick CorvoHoodlumFistrick's Thug
The Hive Elena ValadisNanochipDecoy QueenEvil BuildingsShip It's Employee
Road Crew Baron HighwayTurbineRoad Rage
Zombozo Acid BreathFrightwigThumbskullZombie Clowns
Great One Enforcer AlienInterpreter AlienLeader Alien
Rojo's Gang RojoAzulAmarillo
Other Villains AntonioBenevelonBlue LeaderBuzzCharles ZenithClancyMayor ColemanCollectimusLord DoomicusDuaneEvil Way BigFrankPrince GyulaHammerHowell WainwrightHulex ColonelHulex WorkersInspector 13JackJarettJonah MelvilleKolarCaptain KorkKrakkenKundoLepidopterran PrisonerMaltruantMino-TogaMissyMorggMutant SeagullsMyceliumNyancy ChanOliver ThompsonPinkyPlant AlienPlant ClonesPoltroonPrisoner 775Red LeaderScooterSeebikSolid PluggSsserpentSubliminoSuemungousaurSunnySurgeonTetramand PrisonerTrans-Dimensional MonsterTrash MonsterTrombipulorViolet OffendersKing XarionYetta
Robots B.L.R.R.T.S.A.M.Slix VigmaRed RobotComputronComputron's MinionsOttoTechadon RobotsMechaneerNaljian DestructorR.E.D.sMouse MinionsStalkerMoon RobotsRemotePerplexahedron GuardsJungle Guardians
Original Future Timeline Dr. AnimoExo-SkullKevin LevinMot SnikrepSplootVilgax
Omniverse Future Timeline Dr. AnimoSubdora
Dimension 23 Orange Offenders
Mad Ben's Dimension Mad Pakmar
Gwen 10 (What-If?) Vilgax
Goodbye and Good Riddance (What-If?) VilgaxBird Villains
Books AnimusAztakCaeciliaDJ ZenutFrostbyteGontuGroombahInfinite MonkeyLouie the HairdresserParasiteScornSeñor ChaosSlezakThe Collector (Collectible Heroes)The Collector (Powerless)Trash Monster
Games Crystal ClawsRemoteSnap DragonTwo-Headed Snake
Generator Rex AlphaBlack KnightBiowulfI-BolSkalamander
The Secret Saturdays V.V. ArgostMunya