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I've had it with you, Tennyson! Always beating me when we were kids! Everything always going your way! I get turned into a freak, you become a world famous superhero!

– Ultimate Kevin to Ben.[1]

Ultimate Kevin is the mutation Kevin Levin went through in Ultimate Alien.


Ultimate Kevin was composed of a larger pool of aliens than his earlier mutations, with multiple parts of his body now being combinations of multiple aliens. His face mostly resembled Jetray's but had Kevin's hair, a patch on his right eye consisting of Swampfire's skin and Humungousaur's eyebrow, and a jaw belonging to Humungousaur that split like Ultimate Spidermonkey. His torso came from Humungousaur but had a backside colored like Jetray. Draped over it was the cloak/set of wings of Big Chill. His right arm mostly resembled Diamondhead's, but with two magenta crystals on his shoulder resembling Chromastone's and a claw resembling Lodestar's. His left arm mostly resembled Swampfire's, but with a metal shoulder spike belonging to Lodestar and a wrist claw belonging to Rath. His right foot resembled Jetray's, while his left foot resembled Rath's. He also had Humungousaur's tail, two of Brainstorm's legs in place of a secondary left arm, one of Spidermonkey's arms as a secondary right arm, and portholes on both his Swampfire-like hand and Lodestar-like claw.

Ultimate Kevin wore Kevin's pants, albeit with tears at the edge of the legs.


Ultimate Kevin's personality became even worse than Kevin 11 was in the original series. Fortunately, Kevin still seems to have some control of his sanity, as he spared an opposing Gwen.

Ultimate Kevin's feelings for Gwen prior to his mutation became mixed with his insanity, as seen when he commenting that he thinks she has deliberately avoided him. He also shows anger when Cooper tries to get in his way and tries to kill him as well. Ultimately, despite his love for Gwen, Ultimate Kevin was overwhelmed by his hunger and nearly killed her.

By Absolute Power: Part 1, Ultimate Kevin's self-control is almost entirely overtaken by his insanity, further cementing Ben's claim that Kevin was too powerful for anyone to beat and that "putting him down" was the best option.


In The Forge of Creation, in order to stop Ultimate Aggregor from absorbing the powers of a newborn Celestialsapien, Kevin had no choice but to absorb the Ultimatrix's powers and turn into, as Vilgax would call it, a misshapen chaotic amalgam form of the creatures of the Ultimatrix. This form easily defeated Ultimate Aggregor and drained his powers, reverting him back into Aggregor. After being scolded by Young Ben for his selfishness when he attempted to absorb the Celestialsapien infant, Ultimate Kevin left the Forge of Creation.

In ...Nor Iron Bars a Cage, Ultimate Kevin returned to the Null Void to avenge his former mentor Kwarrel by killing Morgg. However, he simply left when Ben and Gwen intervened and Morgg was brought to justice.

In The Enemy of My Enemy, Ultimate Kevin goes rampant on attacking Argit for all his double-crossing. Fortunately, Argit's ability to turn off his pulse confused Ultimate Kevin into leaving the Plumbers' Academy.

In Absolute Power: Part 1, Ultimate Kevin's instincts have caused him to develop an insatiable hunger for energy and begins draining the life force of anyone unfortunate enough to cross his path, regardless of whether or not they had powers. Ben still thinks that eliminating Kevin once and for all would be the best choice. Gwen, however, sees that the power is controlling Kevin's mind and puts her own life at stake to help Kevin by talking.

Ultimate Kevin while battling Alan

Ultimate Kevin admits to Gwen that he retained a single shred of his humanity, which was enough to stay away from Gwen, knowing that his remaining willpower would be overwhelmed by his insanity and that he would end up draining her if he got the chance. Overwhelmed by his hunger, he then becomes obsessed with her life force and powers and ends up tracking her.

Ultimate Kevin was cured in Absolute Power: Part 2, thanks to the efforts of Ben, Gwen, Cooper, and Darkstar. However, Darkstar betrays the team and becomes Ultimate Darkstar by absorbing the powers from the Dominus Librium, which had absorbed all of Ultimate Kevin's powers. Fortunately, Ben anticipated this from the beginning and presses a button that strips Morningstar of his new powers.

Grandpa Max, Julie (wearing Ship), and Ra'ad (accompanied by Bivalvan, Galapagus, P'andor, and Andreas) collectively reveal that Ben's move also returned the powers Kevin collected to their rightful owners and revived the five Andromeda Aliens that Aggregor had absorbed previously.

In Night of the Living Nightmare, Ultimate Kevin appeared in a dream, trying to convince Ben to surrender the Ultimatrix. However, he was quickly defeated and reverted back to normal when Ben transformed into Ampfibian and electrocuted him.

In The Ultimate Enemy: Part 2, Ultimate Kevin appeared in a flashback.

Powers and Abilities

Overall, Ultimate Kevin had access to the abilities of every normal and Ultimate alien Ben had in the Ultimatrix during the second season of Ultimate Alien.[DM 2][DM 3] Over time, he would gain new powers and add onto existing ones by absorbing those of the Plumbers' Helpers, Dr. Viktor, and Stone Creatures.[2]

Ultimate Kevin still retained his normal counterpart's absorption abilities, being able to absorb powers, energy, and matter.[DM 4][merch 1] Eventually, he even became able to absorb power from a close distance away.[1]

Ultimate Kevin had an incredible amount of physical strength and durability, both of which came from a multitude of aliens: including both regular and Ultimate Humungousaur, Four Arms, Armodrillo, Rath, and Way Big. His Appoplexian claw allows him to smash and cut things much easier, shown when he used it to mine rock[3] or slice trees clean off.[2]

Ultimate Kevin had a degree of enhanced agility, through the combination of his Aerophibian, Arachnichimp, and Kineceleran DNA.[citation needed]

Both Ultimate Kevin's flight and intangibility primarily came from Big Chill, the former by using his wings.[4][5]

Ultimate Kevin was able to morph his Petrosapien arm to create weapons or tools such as a pickaxe,[3] as well as using it to fire crystal projectiles.[1]

Out of the portholes on his hands, Ultimate Kevin could shoot out jets of water or fire blasts, which came from Water Hazard and Swampfire, respectively.[5]

After absorbing Alan Albright's Pyronite powers, his fire manipulation and resistance to fire both grew stronger. Kevin began to frequently set his entire body on fire, resist being exploded, and easily walk through blazes.[2]

Ultimate Kevin could expel either fire or freezing breath from his mouth, thanks to the powers of Alan and Big Chill, respectively.[2][1]

Besides pyrokinesis, Ultimate Kevin also shared many more of Swampfire's powers, such as controlling plants and generating seeds from which vines would grow.[2]

Similar to aliens such as Jetray and Ampfibian, Ultimate Kevin was able to survive in the vacuum of space.[5]

Ultimate Kevin could fire and manipulate electricity thanks to his wide array of electric aliens' DNA: Transylian; Cerebrocrustacean; Nanochip; and Amperi. His Cerebrocrustacean DNA in specific also allowed him to generate shields made of yellow electricity.[5]

Through either having Humungousaur's chest or Jetray's DNA, Ultimate Kevin was resistant to neuroshock blasts.[5] He could also fire neuroshock blasts himself via his one horn.[2]

From his eyes, Ultimate Kevin could fire red or green energy blasts, belonging to NRG and Jetray, respectively.[2][4]

Thanks to his Polymorph DNA, Ultimate Kevin could turn his entire body or any part of it into slime, giving him elasticity and shapeshifting.[5][2]

Ultimate Kevin could absorb incoming energy or electricity and redirect it as rainbow energy beams through the Crystalsapien crystals on his shoulder.[1]

Ultimate Kevin could split his jaw open and fire a sticky web from it, exactly like Ultimate Spidermonkey.[2]

Through his Sonorosian DNA, Ultimate Kevin could shoot sonic screams.[2][1]

Through his Prypiatosian-B DNA, Ultimate Kevin could fire nuclear blasts and instantly create explosions.[1]

Through his Talpaedan DNA, Ultimate Kevin was able to create tremors that quaked the ground.[1]

Through his Geochelone Aerio DNA, Ultimate Kevin was able to generate tornadoes through aerokinesis.[1]

Through his Biot-savartian DNA, Ultimate Kevin had the power of magnetism.[1]

Ultimate Kevin became able to project blasts of mana after completely draining Gwen's Stone Creatures.[2] This also gave him the ability to detect mana, as he could "smell Gwen's mana everywhere" while at her house.[1]


Ultimate Kevin was not always aware of the extent of some of his powers or how to use them. He did not use the powers of all of his DNA samples and had to learn how to use certain powers. For example, he was unaware he could phase through the Rust Bucket 3 until Ben pointed that out.[5]

This weakness also applies to his mana manipulation, as his mana seemed to be significantly weaker than that of an experienced mana user like Gwen. While one orb from Ultimate Kevin was able to overpower a single mana projectile from Gwen, it was unable to thoroughly break Gwen's shield, only leaving minor cracks.[1]

If caught by surprise, Ultimate Kevin can be hurt by electricity.[5][2][1][6]

Ultimate Kevin was weak to an Evolved Sonorosian's sonic disks, as Ultimate Echo Echo's "Sonic Doom" attack was the only attack ever capable of knocking Kevin out, and also being one disc blast away from killing him.[1]

Ultimate Kevin could be affected by a Nemuina's sleeping dust.[DJW 1]

Ultimate Kevin could experience fear at the presence of Toepick's species.[DJW 2]


Ultimate Alien

Season 2

Season 3

Mobile Games


Punch Time Explosion and XL

In Cartoon Network: Punch Time Explosion, Ultimate Kevin appears as a boss. In the game's story, Kevin has been turned into Ultimate Kevin by Vilgax. He is returned to normal after being defeated by Ben, Chowder, and Buttercup.

In Cartoon Network: Punch Time Explosion XL, Ultimate Kevin also appears as Kevin's Punch Time Explosion.


  • Greg Cipes did not use a filter to make his voice deeper when he voiced Ultimate Kevin. Instead, he just changed his voice.[DM 5]
  • The crew went through many design concepts for Ultimate Kevin before settling on the final design.[DM 5]
  • Ultimate Kevin did not have access to Alien X's powers due to that form being immediately relocked in the Ultimatrix before the team traveled to the Forge of Creation.[DM 3][DM 6]
  • Ultimate Kevin did not absorb Ultimate Aggregor's powers because he needed to, but because he wanted to.[DM 7]
    • Ultimate Kevin did not change in appearance when he did so because he only absorbed Ultimate Aggregor's energy, not his genetic structure.[DM 8]
    • Aggregor used a machine to change the Andromeda aliens into energy so he could absorb all of their power. This was the energy that Ultimate Kevin absorbed.[DM 9]
  • Kevin did not use the same method he was taught to revert from Kevin 11 to get rid of the Ultimate Kevin mutation because he absorbed a great deal more power. It would not have been easy to discharge it, especially when it felt good to absorb more.[DM 10]
  • Ultimate Kevin was the Alien of the Month in December 2011.
    • However, in Australia, Ultimate Kevin was the Alien of the Month in November 2011 rather than Ultimate Echo Echo.


Crew Statements

Dwayne McDuffie

Derrick J. Wyatt


  1. Ben 10 Ultimate Alien: Power Struggle DVD; file
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