Ben 10 Wiki
Ben 10 Wiki
White trix This article belongs to the Original Future Timeline in the Classic Continuity
This article is about Ben 10,000's son from the Original Future Timeline. You might have been looking for Ben 10,000's son from the Omniverse Future Timeline, Gwen's brother from the Classic Continuity or the character from the Reboot Continuity.

The call comes in, and my dad takes off to, you know, save the world. And some day, I'll be right beside him.

– Ken to his friends.[1]

Kenneth "Ken" Tennyson is Ben and Kai's[pop-up 1][1] son and Gwendolyn's brother[pop-up 2][2][pop-up 3][3] from an alternate timeline.[note 1]


Regular Appearances[]

Ken bears a striking resemblance to his father when he was his age, albeit inheriting minimal features from his mother. His clothes are modeled after his father's. These include a white skin-tight T-shirt with black accents and borders at the sleeves, and his trademark baggy green cargo pants. Ken's eye color is even the same as Ben's. His skin tone is slightly tanned, his hair is dark brown in color without any strands hanging down the back like Ben's did at his age, and his nose slightly flatter and more straight compared to Ben's, traits which he inherited from Kai.

Occasional Appearances[]

Ken wears long-sleeved light blue pajamas.


Ken is very much like his father was when he was 10 years old, as exemplified by his immediate friendship with fellow troublemaker Devlin Levin.[1]

Ken was shown to be slightly more intelligent and resourceful than his father was at the same age, as he used Grey Matter to hack his Omnitrix and remove the limiter, something that his father seemingly did not consider doing himself.[1]


Ben 10[]

Ken first appeared in Ken 10, where he celebrated his 10th birthday. Among the gifts he received were a hoverboard from his great-grandfather, a Rock Monster pet from his aunt, and his own Omnitrix from his father. Ken, initially ecstatic about the Omnitrix, was soon disappointed with his pre-selection of aliens. Furthermore, even though Ken was allowed to join his father when he was alien hunting, Ben's years of experience and efficiency left Ken in the dust without any kicks.

Going out flying with the hoverboard, Ken ran into Devlin, a young street urchin who befriended him and consoled him about his issues with his father. Later that night, while his headquarters were being broken into, Ben initially decided to allow his son to join in against whatever foe has broken in this time, until he discovered the one responsible to be none other than his old foe Kevin Levin and grounded Ken to his room.

While the two fought, Ken used Grey Matter to sneak out of his room, eventually arriving in the empty Null Void Chamber just as Kevin fled. Meeting up with Devlin in the morning, he proposed that they try to deduce what was wrong with the Null Void Projector in order to prove themselves to Ben. Having deduced and located the projector, Ken and Devlin broke in, only for Devlin to reveal that he was the one who Ben was fighting.

Furthermore, he released his father, the real Kevin 11,000, who proceeded to beat on the newly arrived Ben, not caring about his son. Ken was able to use Grey Matter to crack the Omnitrix to remove the limiter and aided his father alongside Devlin to fight Kevin. Getting wounded in the crossfire, Ken's injury enraged Ben to the point that he beat Kevin into the ground. Devlin captured Kevin in a Null Void Containment Egg. With Kevin now in custody once more, Devlin came to live with Ben and Ken.

Powers and Abilities[]


Ken wears an Omnitrix made by his father on his left wrist. Like Ben, Ken had access to only 10 alien forms at first. However, its playlist differed greatly than what Ben started out with. Wanting to make sure Ken wasn't in danger of hurting himself or anybody else like Ben was when he first got the Omnitrix, he took the liberty of downloading some of the least collateral aliens with only minimal battlefield use: Wildvine, Ditto, Buzzshock, Spitter, Snakepit, Sandbox, Shellhead, and Toepick. However, for the sake of having an escape plan, he did leave him with two of his own classics: XLR8 and Stinkfly. Ken convinced Ben to replace Toepick with Grey Matter, whom he later used to remove the limiter of his Omnitrix during his fight with Kevin 11,000.

Ken owns an X321 hoverboard, given to him by Max.


Ben 10[]

Season 4[]


  • Ken's favorite Omnitrix aliens are Four Arms, Diamondhead, Way Big, and Atomix, the latter of which Ken seemed to be most excited to turn into than any other alien when he got his Omnitrix.[1]
  • Ken's mother Kai missed his 10th birthday due to being on a diplomatic mission in the Shadow Realm.[pop-up 1][1]
  • Ken was designed by Thomas Perkins.[TP 1] Prior to his introduction, Thomas had a story in mind for how the tale of Ben Tennyson would eventually lead to a successor for the Omnitrix.[TP 2]
  • Thomas Perkins had always intended for a future version of Kai to be Ken's mother, even though it was not scripted at the time. This is likely because, during the Original Series, Kai was the only real crush Ben had as far as Perkins can recall.[TP 3]


  1. The Ben 10,000 from Omniverse is stated to be Ben Prime's true future self.[DJW 1]
    • This is evidenced in-show by the fact that both the Ben 10,000[4][5] and the future Dr. Animo[6] from Omniverse recalled characters and events from the present day. Chrono-Spanner also frequently visits present day with effects of his actions manifest in his present.[7] This would not be possible if these characters belonged to an alternate timeline.
    It was also stated that the Ben 10,000 from Omniverse is the same character as the Ben 10,000 from the Original Series.[DJW 1][DJW 2][DJW 3]
    • This was due to the crew's preference of the original Ben 10,000 over the Ultimate Alien portrayal,[DJW 3] as well as executives wanting everything to be more like the Original Series.[DJW 2]
    • Derrick J. Wyatt made several statements to corroborate the story, expanding on what is known from the Original Series, such as the backstory for the Biomnitrix invoking the plotline of Ben 10,000,[DJW 4] and the defining tragedy in Ben 10,000's life having now occurred at the age of 20,[DJW 5] "shifted" from the original age of 15.[pop-up 4][2]
    • The writing of the show also indicated this viewpoint, with Ben identifying the future Dr. Animo from Animo Crackers to be the same as the one he encountered in Ben 10,000, and other efforts made throughout the last few seasons to align the story with the future timeline.
    However, the above two statements are inherently contradictory, because the Original Series Ben 10,000 was from an alternate timeline[8][9][pop-up 5][2][pop-up 1][1] in which he never travelled to the future when he was 10, and consequently did not give Max a cake on his 60th birthday, while Ben Prime did.[2] Thus, the Original Series Ben 10,000 did not recall the events of the episode.[9][DM 1][DM 2][DM 3]
    • Derrick responded to the matter by saying: "Your 'plot holes' are irrelevant. Time isn't completely fixed, it's shifting. Events can be subtly altered. But Ben 10,000 is the future for the Ben Prime timeline."[DJW 1] This can be interpreted as a retcon. This wiki, however, considers the two Ben 10,000s, and by extension, the two futures, separate.



Crew Statements[]

Derrick J. Wyatt[]

Dwayne McDuffie[]

Thomas Perkins[]

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 InstructorSecurity OfficersUjinY-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 SlerdlerkMedicPaxSmoothie 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 DomstolDragonDignitary 16DubbaFrolicGalvan 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