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Tetrax Shard[pop-up 2][2] was a Petrosapien[3][4] mercenary from Petropia,[5] now reformed as an agent of good in the Milky Way and an ally of Ben Tennyson.


In the original series, Tetrax's face was the spitting image of Diamondhead's, with the exception of having green eyes instead of yellow, and his diamond skin having a slightly bluer tint. Tetrax wore a shiny grey bodysuit with triangular pauldrons and a utility belt, and on top sat a retractable black helmet resembling a pillbug. Since he never took off the suit, he had no exposed back spikes, though the suit could retract to show his arms. The motif of an upside-down triangle symbol is present throughout his suit: on the center of his utility belt; on his pauldrons; and as a small green window on the front of his helmet.

In Alien Force, Tetrax's skin is now the same hue as Diamondhead's at the time. His suit is now a blue-grey, with a black stripe going down the center and black boots. He no longer wears a utility belt, instead his pouches are just attached to his waist as if he did have one. He has no pauldrons, though his shoulders retain the triangle symbol, now filled in yellow. His armor under his helmet no longer goes up to his neck, instead somewhat revealing the upper part of his chest.

In Destroy All Aliens, Tetrax looked like he did in the original series, but his eyes had jewel-like facets.

In Secret of the Omnitrix, Tetrax briefly wore a helmet with a visor, specialized to fit his Petrosapien head, as well as circuitry-patterned gloves, to operate the holographic controls of the Resolute's scanning machine.


When I was young, I didn't care about anybody but myself. So it made sense that I wound up a mercenary, a soldier for hire. I was loyal to whoever paid me the most, no matter how evil they were. It was only a matter of time before I would work for the worst of the worst - Vilgax! I stole the last piece of the puzzle Vilgax needed to invade my home world. But when my people didn't bow at his feet, he destroyed the entire planet to make an example out of it! Vilgax did the dirty work, but he couldn't have done it without my help. So when I heard that he was after the Omnitrix, I vowed to never let another powerful weapon fall into his claws again!

– Tetrax to Ben.[1]

Tetrax is a battle-hardened bounty hunter with a strong desire to do what is right. This is partly due to his involvement in the destruction of his home planet, Petropia.[1]

Tetrax claims that he used to be a being who cared about no one but himself and that is what led him to become a mercenary. It was only after Vilgax destroyed Petropia that he realized the effect his actions had on his own people. That experience made Tetrax into the heroic Omnitrix guardian he became.[1]

Upon first discovering that Ben Tennyson has the Omnitrix, he laments the fact that out of the planet's six billion inhabitants, the Omnitrix ended up on the wrist of a child. He also berates Ben's lack of strategy in regards to its use. After helping Ben to defeat the other hunters, during which Ben learns to use the Omnitrix strategically, he decides that the Omnitrix is in good hands, allowing it to remain with Ben.[2]

Tetrax helps Ben become a better hero, teaching him to use the Omnitrix wisely. Ben later repays him by reviving the people of Petropia.[5]

Tetrax deeply despises Vilgax due to their history.[1]



3SOTO (529)

Tetrax betrays his people

As a being who cared about no one but himself, Tetrax became a mercenary and ended up hiring himself to Vilgax. When he finished the job Vilgax gave him, Vilgax created a weapon (using the crystal Tetrax stole) and used it to destroy Tetrax's home planet, Petropia, when his people would not bow down to him.[5]

3SOTO (540)

Tetrax witnessing the destruction of Petropia (OS)

This caused Tetrax to betray his former employer and join a team dedicated to stopping Vilgax at all costs.[pop-up 3][1][merch 1] He also dedicated his life to learning everything about the Omnitrix.[pop-up 4][1]

Ben 10[]

Tetrax first appeared in Hunted under the alias of "Hoverboard" where he competed against Kraab and SixSix to obtain the Omnitrix from Ben. He later assists Ben against the other two bounty hunters and saves Gwen and Max.

Tetrax returns in Ben 10: Secret of the Omnitrix. Tetrax arrives on Earth after receiving the Omnitrix's SDM (Self Destruct Mode) signal, and takes Ben aboard his ship in search of Azmuth, the creator of the Omnitrix and the only one who can deactivate the self-destruct function. Unfortunately, Tetrax's problems are multiplied when Gwen stows away aboard his ship, and Ben's transformations are revealed to accelerate the countdown.

On Incarcecon, Tetrax runs into SixSix, another of the bounty hunters hired by Vilgax who ended up on Incarcecon. After a brief battle, he and the Tennysons find Myaxx, Azmuth's former assistant. Because of her, Tetrax is forced to reveal that the Omnitrix's explosion will create an energy ripple that will destroy the entire universe. Tetrax then leads the group to Azmuth's compound on Xenon, where he faces SixSix again before defeating him by delivering a punch to the face.

Tetrax appears again in Ben 10: Destroy All Aliens, where he arrives to Earth to find Ben after picking up a signal from the Omnitrix. He locks Ben from reverting back to normal for his own good and is sucked into the Omnitrix with Gwen, where they are attacked by a swarm of Vulpimancers. Tetrax manage to escape from the Omnitrix through Gwen casting a spell that teleports them away, but Tetrax and Max are forced to fight Ben's mom & dad when they are transformed by the Omnitrix into a Pyronite and a Vulpimancer respectively. Fortunately, the Mechamorph Armor merges with the Omnitrix and Gwen casts a spell that transforms Ben's parents back. Tetrax, Azmuth, and the latter's father hide elsewhere to avoid being sighted by Carl and Sandra. Later on, Tetrax leaves Earth.

Alien Force[]

Tetrax returns in The Secret of Chromastone, when he comes to Earth, demanding that Ben hand over Chromastone. He transforms Ben into Diamondhead, thinking he'd transform into Chromastone. He then uses a sonic device to shatter Diamondhead, seemingly releasing Chromastone from the Omnitrix and leaving Diamondhead alive in pieces (literally). Tetrax gives Chromastone a crystal which he absorbs, then flies off into space. Kevin restores Ben to normal, who then demands an explanation from Tetrax.

TSoC (203)

Tetrax witnessing the destruction of Petropia (AF)

Tetrax reveals that Chromastone is the only one who can restore Petropia and his people back to life. He explains that the crystal he stole and gave to Vilgax (who used it to power the weapon that destroyed Petropia) was in fact a crystallized back-up for both his planet and its people. Upon discovering this, Tetrax stole the crystal back from Vilgax and gave it to the freed Chromastone so it could use the crystal to restore Petropia. This was Tetrax's way of atonement for his part in Petropia's destruction.

However, his theft of the crystal didn't go unnoticed by Vilgax, who followed Tetrax to Earth, demanding he hand over the crystal. Tetrax, Ben, Kevin, and Gwen are then chased by Vilgax, who he believes are in possession of the crystal. Vilgax eventually manages to catch Tetrax, demanding he hand over the crystal, but Kevin accidentally reveals the crystal's location. Vilgax flies off to Chromastone's location to discover the newly restored Petropia (Ben and company race to stop him aboard Tetrax's ship).

Angered that someone would use "his crystal" to restore a dead world, Vilgax beats Chromastone, who pleads for mercy, only to find Vilgax has none to give. Tetrax, Ben, Kevin, and Gwen arrive to see Vilgax beating Chromastone. Tetrax attacks Vilgax, but Vilgax's shield protects him from the crystal projectiles.

To Tetrax's horror, Vilgax removes the crystal from Chromastone before he can revive the Petrosapien people. However, Vilgax discovers the crystal power is gone, leaving it no longer useful to him. Vilgax flies off in disappointment, leaving behind the dying Sugilite. All hope seems lost, but the dying Sugilite generates a new backup crystal and hands it to Ben before fading away. Unsure of how to use the crystal, Ben transforms into Diamondhead, who instinctively knows how to use it and restores the Petrosapiens back to life.

Tetrax and a revived Chromastone (who is revealed to be Sugilite) thanks Ben for his help. Tetrax decides to give Ben and company a lift back. Before leaving, Ben thanks him for the ride back home. Tetrax told Ben that it was the least he could do. Gwen says that she, Kevin and Ben don't want to hold him back as he must be anxious to get back to his friends. Tetrax replies that he is, but first, he's got a score to settle with Vilgax. Ben wonders if it's really such a good idea, as Vilgax is pretty much invincible. Tetrax just replies with a simple "Maybe....Maybe not..."

Powers and Abilities[]

Being a Petrosapien, Tetrax has all the same powers as his species, most notably his ability to fire crystal shards from his hands, and his immense durability against most energy weapons. He onced used his durability and strength in combination to punch right through the heart of one of Vilgax's attack droids.[2]

In addition to his natural powers, Tetrax is an experienced bounty hunter with excellent fighting and strategy skills. He once easily blocked and countered every attack Diamondhead could throw at him using only one hand, whilst also criticising his brutish fighting style.[2] He is also very fit for a Petrosapien, as he constantly trains in between his missions,[6][1] and has very sharp reflexes.[2]

Tetrax is also shown to be highly knowledgeable in regards to various advanced technologies. He is particularly devoted to understanding how the Omnitrix works, and was even able to reprogram it.[7]


Tetrax wears nearly impenetrable gray armor over his entire body, the only exception being his head, which is instead protected by a black, pillbug-shaped, retractable helmet. His suit is made of nanotechnology, as it instantly retracts around his arms to allow him access to his Petrosapien powers,[2] and he can just as easily generate crystals out of his body and through the suit without doing any damage to it.[1]

Tetrax is equipped with various devices and weapons at his disposal, his most trusty one being his sidearm, a blaster that has multiple functions: it can fire both a single or sustained blue shot for standard offense;[1] can launch smoke grenades;[2] or can fire green shots that cause an incredibly large explosion.[2]

He also has a small scanner device, which can track various things, such as the Omnitrix's signal[2] or a being's DNA signature.[1]

He also had a device which could deploy a floating blue cube of energy, that could grow to envelop someone and then shrink back down, miniaturizing and trapping them in the cube.[2]

He also carried a device that was used to completely destabilize Diamondhead's body and unearth Chromastone beneath it, nearly killing him in the process.[5]

Tetrax has his own personal ship, The Resolute, and on it, a collection of hoverboards; which he is skilled at flying with.[1] He gave one of them to Ben Tennyson.[2]

Tetrax has many disguises for the requirements of various missions. He has one that drapes over his standard suit, and also had one that was more striking in appearance, left over from a celebration on Arburia.[pop-up 5]

Tetrax could teleport to his ship through use of an unknown technology.


Tetrax has the same weaknesses as his species.


Ben 10[]

Season 1[]


Alien Force[]

Season 2[]

Online Games[]

Ben 10[]

Online Games[]


He is found in Forsaken Valley and his Fusion gives out the Humungousaur Nano.

Naming and Translations[]

Language Name Origin
Spanish (HA) Tetrax Shard
Diamante (Ben 10: Destroy All Aliens)
From the original English name.
From diamante, diamond; dub error (Tetramands and Tetrax have Diamondhead's Latin American name in Ben 10: Destroy All Aliens).


  • The rivalry between Tetrax and SixSix goes on well into the future until it is finally settled in one final showdown.[pop-up 6][1]
  • As an undercover agent, Tetrax has learned many secret override codes for hundreds of security systems.[pop-up 1][1]
  • Tetrax was the first alien shown in the series to be the same species as an Omnitrix alien.
  • Tetrax does not appear to have four spikes on his back like Diamondhead, although he had them in a flashback of his younger self.[1]
  • According to himself, Tetrax has never had a cold.[5]
  • The Omniverse crew always wanted to have Tetrax appear in the show,[DJW 1] but an alternative version of him appears in the show instead.
  • In Destroy All Aliens, the texture of Tetrax's armor was based on Roman armor.[AC 1]
  • Tetrax was originally listed in the credits of Hunted by his Hoverboard alias. This name was also used in Ben to the Rescue and on the packaging for his Transforming Alien Rock figure.
    • For his 4" figure, Tetrax is known on the toy's original packaging as Petrosapien Bounty Hunter.[merch 2] Likewise, his Corinthian micro figure was called Bounty Hunter.[merch 3]
    • Out of the merchandise for the character, Tetrax has been properly named in a 3-pack[merch 4] and the Destroy All Aliens reissue of his 4" figure.
  • The triangular motif on Tetrax's shoulders in the original series is reminiscent of the Omnitrix's original pre-production design, as it appeared on the shoulders of Four Arms and Wildmutt.



Derrick J. Wyatt[]

Audio Commentary[]


Prime Timeline
Tennyson Family Ben TennysonBetty Jean TennysonBig Chill's OffspringCamille MannCarl TennysonClyde FifeFrank TennysonGordon TennysonGwen TennysonJoel TennysonKen TennysonMax TennysonNatalie TennysonSandra TennysonVera TennysonVerdona
Levin Family Harvey HackettKevin's MotherKevin LevinZedDevin Levin (retconned)
Rook Family Rook BenRook BlonkoRook BrallaRook DaRook SharRook ShiRook Shim
Secondary Characters Alan AlbrightAzmuthBlukicCash MurrayCooperDribaEsterHelen WheelsHexHobbleMr. BaumannJTJimmy JonesJulie YamamotoKai GreenManny ArmstrongPakmarMagister PatellidayPierce WheelsProfessor ParadoxRad DudesmanReinrassig IIIShipSkurdTetrax Shard
Plumbers Magister ArnuxBel Biv KaboomBromebaBranniganBrykChortleMagister CoronachDraxBig EdElliotFistinaGalvan TeacherMagister LabridMagister HulkaI.M. WerfzelJerryLeadfootLucy MannMagistrataMedicMolly GuntherMortyMagister Prior GilhilMagister PykeRobucketScoutSecurity AliensStick DougTackVictor ValadisWat-SennWes GreenXyleneZorian
Forever Knights foreverduke838SquireSir Winston
Galactic Enforcers UltimosSynaptakTini
Andromeda Aliens AndreasBivalvanGalapagusP'andorRa'ad
Sentient Ultimate Forms Sentient Ultimate Big ChillSentient Ultimate CannonboltSentient Ultimate Echo EchoSentient Ultimate HumungousaurSentient Ultimate SpidermonkeySentient Ultimate Swampfire
Galvan Azmuth's FatherChadzmuthDuffyFergiLuhleyDrill InstructorSoldiersUjinY-itZennith
Arachnichimps HaplarHaplar's BabyHaplar's Mate
Atrocians Blue-WorstGreen-WorstOrange-WorstPink-WorstPurple-WorstShe-WorstSlim-WorstViolet-Worst
Gourmands Private BrownbagSergeant Cast IronSergeant CookmeisterQueen Voratia Rumbletum
Highbreed Bailiff (Alien Force)Bailiff (Omniverse)Bunker HighbreedFormer Highbreed SupremeHighbreed Councilors
Lewodans CaitiffCicelyPrince of LewodaZaw-Veenull
Kinecelerans DJE-NK8-EML-EN-8N-DT8-M
Tetramands BahrvadGar Red WindLooma Red WindTetramand Priest
Bellwood Residents Alton AlabasterBen's Teacher (And Then There Were 10)Ben's Teacher (Destroy All Aliens)Bill GacksDr. BorgesCarol SmithChet RigbyEmilyExasperated GuyJamieMrs. JonesJonesyJuliusMadisonMadison's FatherMollyNatalie AlvarezPierce's GirlfriendMrs. RheaultSenseiSparring PartnerTeejThaddeus J. CollinsTrinaWaltWatchmakerMr. WebbMr. Yamamoto
Undertown Residents Alien Incidental 15BlowfeldBuzzFruit VendorGenghis KenGilford BromleyGil SteptoeLacknoLillimusha DiForestiniLoovis SlerdlerkMedicSmoothie VendorSock VendorSponge GorbTentacle VendorToby MonitorWhalium Whalace
Actors Abel NorthCerebrocrustacean ActorDeefus VeeblepisterFridgeGourmand ActorGwenettesHughJennifer NocturnePiscciss Volann ActorSwampsVilgax Actor
Magic BezelElsgoodElvesIgnaceousSpellbinderThomas Jingles
In-Universe Media Doggy BuddyFiery BuddyHandy BuddyIshiyamaKappaKenko
Other Humans Air Force Major GeneralAmazing AlanAndyProfessor AnicetoBarryBobBradAgent BrysonDonovan Grand SmithDougEarlEddie Grand SmithEdithErinErin's BoyfriendEuniceMrs. FangFitzFlorenceFritzGaterboyGenaroGilbertGeneral GroffHaroldHectorHelena XaglivH.E. GradyHelioHervéHotel GuardHugoImmovable ObjectJeffJoan MaplewoodJoeDr. KellyLarryLawrence WainrightCouncilwoman LiangAgent LockeOfficer LouLucyMandyMargieMartySheriff MasonMaureen NocturneOfficer MullenOliver ThompsonPorcupinePresidentRangerRegisRogerMrs. RozumSandwich VendorCaptain ShawShelbyShip-It EmployeeDr. ShuemanLieutenant SteelSteve CummingsSumo Slammer Collecting BoyTiffanyTim DeanTodd MaplewoodTylerValadis Laboratories JanitorVance VetteroyOfficer WellsWolf BlitzerMr. Zu
Other Aliens Baby CelestialsapienBlowfishCentur SquaarChicken AlienCosmic MomCow AlienDeckaJudge DomstolDragonDubbaFrolicGalvan Museum GuardsGlutoGrackGrickIncursean WarriorKwarrelKyle MonitorLuLukikMaliceMechamorph GuardMouldywarpMyaxxNosedeeniansNull Void SettlersOrbParts DealerProbityPyxiQuinceRayonaScreegitSentinelSentinels of MonarchSerfSheelaneSmuggled PsycholeopterranSugiliteTechnorgTinyTiny's FatherTiny's MotherTrukkTwoTwoVexxViktoriaWarden K'dakYetiZavinZex TannersnedeZs'iza and Zs'oiseZzzakt
Alternate Dimensions/Timelines
Original Future Timeline Ben TennysonDevlin LevinGalactic Enforcers (UltimosSynaptakTini)Gwendolyn TennysonGwendolyn Tennyson (Ben's Daughter)Ken TennysonKen's PetMax TennysonMaxatomar Kid
Race Against Time Timeline Ben TennysonCarl TennysonMrs. CarlyleCash MurrayConstantine JacobsDoris DaltonEdward WhiteMr. EnguellsGwen TennysonMr. HawkinsMr. JenyxJTMax TennysonOld ManSandra TennysonMr. Whittington
Time Heals Timeline Ben TennysonGwen TennysonKevin Levin
Ultimate Alien Future Timeline Ben Tennyson
Dimension 23 AzmuthBen TennysonSevenSevenTetrax Shard
Omniverse Future Timeline ArgitBen TennysonBlukicGwendolyn TennysonJ. Jonah JonesKai TennysonKen TennysonKevin LevinMax TennysonRook BlonkoWill Harangue
No Watch Timeline Ben TennysonGwen TennysonJTKevin LevinMax Tennyson
Gweniverse Gwen Tennyson
Argitrix Timeline Argit
Mad Ben's Dimension Mad HarangueMad Rook
Gwen 10 Ben TennysonGwen TennysonMax TennysonThe Seer
Goodbye and Good Riddance ArnoldBen TennysonBen's DogBen's TeacherCarl TennysonCash MurrayGwen TennysonJamieJTMax TennysonPetersonSandra TennysonThe Seer
Books Alien ContractorsDinosaur EVOGladiatorGuardIlma NarLonnieLorelaiPlen StroffPresidentPrisoner From the Planet DustovRobotic BullSoolSkraprr ByakkoElena ValadisTimothyTini Rau
Other 10/10/10 Box Aliens
Non-Ben 10
Generator Rex Agent SixBobo HahaCaesar SalazarDiane FarrahRebecca HolidayRex SalazarWhite Knight
The Secret Saturdays Doc SaturdayDrew SaturdayFiskerton SaturdayKomodoZak SaturdayZon
Other Non-Ben 10 Characters ButtercupDexterEdd
MAD Benjamin Franklin