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I've had it with you, Tennyson! Always beat 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's composition is more complex than his earlier mutations from his youth, with multiple parts of his body being combinations of multiple aliens. His face mostly resembled Jetray's, but with Kevin's hair, a patch around the right eye resembling Ultimate Humungousaur's, and a jaw belonging to Ultimate Spidermonkey with an interior resembling Echo Echo's. His torso resembled Humungousaur's, but with the backside colored like Jetray and a set of wings resembling Big Chill's. His right arm mostly resembled Diamondhead's, but with two magenta crystals on the shoulder resembling Chromastone's and a claw resembling Lodestar's. His left arm mostly resembled Swampfire's, but with a 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 Water Hazard's water 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 have become 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 Osmosian 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 nearly every normal and Ultimate alien Ben had in the Ultimatrix during the second season of Ultimate Alien. Over time, he would gain new powers and/or add onto existing ones by absorbing those of the Plumbers' Helpers and Viktor.[2]

Ultimate Kevin's flight and intangibility primarily came from Big Chill; this is because the appearance of their wings and the execution of their intangibility are similar.

Ultimate Kevin's enhanced strength and durability come from a multitude of aliens, including both regular and Ultimate Humungousaur, Four Arms, Armodrillo, Rath, and Way Big.

Similar to aliens such as Jetray and Ampfibian, Ultimate Kevin was able to survive in the vacuum of space.[3]

Being part-Methanosian, Ultimate Kevin shared many of the same powers as Swampfire, such as pyrokinesis, chlorokinesis, seed generation,[2] regeneration, and limb reattachment.

Being part-Sonorosian, Ultimate Kevin shared many of the same powers as Echo Echo, such as sonic screams.[2]

Being part-Vaxasaurian, Ultimate Kevin shared many of the same powers as Humungousaur, such as size alteration.

Being part-Aerophibian, Ultimate Kevin shared many of the same powers as Jetray, such as neuroshock blasts.[1]

Being part-Necrofriggian, Ultimate Kevin shared many of the same powers as Big Chill, such as ice breath[1] and cryo-phasing.

Being part-Crystalsapien, Ultimate Kevin shared many of the same powers as Chromastone, such as ultraviolet beams,[1] light generation, and force field generation.

Being part-Cerebrocrustacean, Ultimate Kevin shared many of the same powers as Brainstorm, such as generating yellow electric shields[3] and a level of enhanced intelligence.

Being part-Arachnichimp, Ultimate Kevin shared many of the same powers as Spidermonkey, such as a level of enhanced agility.

Being part-Polymorph, Ultimate Kevin shared many of the same powers as Goop, such as elasticity, self-liquification,[2] slime spit, and acidic slime.

Being part-Arburian Pelarota, Ultimate Kevin shared many of the same powers as Cannonbolt, such as sphere transformation.

Being part-Murk Gourmand, Ultimate Kevin shared many of the same powers as Murk Upchuck, such as solid matter ingestion.

Being part-To'kustar, Ultimate Kevin shared many of the same powers as Way Big, such as cosmic rays.

Being part-Vulpimancer, Ultimate Kevin shared many of the same powers as Wildmutt, such as a level of enhanced senses.

Being part-Biot-savartian, Ultimate Kevin shared many of the same powers as Lodestar, such as magnetism.[1]

Being part-Pyronite, Ultimate Kevin shared many of the same powers as both Heatblast and Alan, such as fire breath.[2]

Being part-Nanochip, Ultimate Kevin shared many of the same powers as Nanomech, such as bio-electrokinesis.

Being part-Petrosapien, Ultimate Kevin shared many of the same powers as Diamondhead, such as firing crystal projectiles and morphing his right arm into weapons such as a pickaxe.[4]

Being part-Ectonurite, Ultimate Kevin shared many of the same powers as Ghostfreak, such as tentacles and body possession.

Being part-Appoplexian, Ultimate Kevin shared many of the same powers as Rath, such as his left wrist claw.

Being part-Orishan, Ultimate Kevin shared many of the same powers as both Water Hazard and Bivalvan, such as hydrokinesis.[2]

Being part-Tetramand, Ultimate Kevin shared many of the same powers as both Four Arms and Manny, such as a level of enhanced jumping.

Being part-Geochelone Aerio, Ultimate Kevin shared many of the same powers as both Terraspin and Galapagus, such as aerokinesis.[1]

Being part-Prypiatosian-B, Ultimate Kevin shared many of the same powers as both NRG and P'andor, such as radioactive and nuclear energy blasts.[2]

Being part-Talpaedan, Ultimate Kevin shared many of the same powers as both Armodrillo and Andreas, such as terrakinesis and a jackhammer arm.

Being part-Amperi, Ultimate Kevin shared many of the same powers as both Ampfibian and Ra'ad, such as electrokinesis,[1] electricity absorption, and electro-phasing.

Being part-Piscciss Volann, Ultimate Kevin shared many of the same powers as Ripjaws, such as underwater breathing.

Being part-Evolved Arachnichimp, Ultimate Kevin shared many of the same powers as Ultimate Spidermonkey, such as spitting webs out of his mouth.[2]

Being part-Kineceleran, Ultimate Kevin gained many of the same powers as both XLR8 and Helen, such as a level of enhanced speed, after absorbing the latter's powers.[2]

Being part-Transylian, Ultimate Kevin gained many of the same powers as both Frankenstrike and Viktor, such as Electromagnetism, after absorbing the latter's powers.[2]

Being part-Osmosian, Ultimate Kevin retained his normal counterpart's absorption abilities, being able to absorb powers, energy, and matter.[DM 1]

Ultimate Kevin gained the ability to generate thorn projectiles after absorbing Pierce's powers.[2]

Ultimate Kevin gained the ability to manipulate Mana after absorbing energy from Gwen's Stone Creatures.[2]


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 2]

Despite being part-Geochelone Aerio, Ultimate Kevin was shown to be vulnerable to Gwen's mana attacks.

Ultimate Kevin was weak against an Evolved Sonorosian's sonic disk attacks.[1]

Ultimate Kevin was vulnerable to electricity, such as that generated by an Amperi.[5]

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 3]
  • The crew went through many design concepts for Ultimate Kevin before settling on the final design.[DM 3]
  • Ultimate Kevin did not absorb Ultimate Aggregor's powers because he needed to, but because he wanted to.[DM 4]
    • Ultimate Kevin did not change in appearance when he did so because he only absorbed Ultimate Aggregor's energy, not his genetic structure.[DM 5]
    • 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 6]
  • 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 7]
  • 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.


Dwayne McDuffie

Derrick J. Wyatt

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