Kevin Levin (Classic)

Kevin Ethan Levin, also known as 'Kevin' 11 or 'Kevin E. Levin' is a Human/Osmosian hybrid with the ability to absorb, hold, redirect, and discharge virtually any type of existing energy or matter through his body at will in order to utilize it in various ways. He first appeared in the original series and quickly became one of Ben's most notable nemesis. However, he was reformed in Alien Force, and then became one of the main hero characters. But in "The Forge of Creation" he is forced to absorb the Ultimatrix's power in order to stop Aggregor and becomes insane again once again. With the help of Cooper Daniels, Darkstar, Ben and Gwen his mutation is reversed, thus bringing him back his sanity in "Absolute Power Part 2".

Appearance
In the original series Kevin had a thin, scrawny body with long black hair, pale skin, and dark brown eyes with black marks underneath them (a sign that an Osmosian had recently absorbed raw energy). He wore a torn black t-shirt, black studded arm bands, brown cargo shorts, gray knee-length boots, and a steel padlock necklace which was a spoil from his first crime: stealing a bike and using it to run away to New York. After he goes through his first mutation, the transformation completely destroyed his clothes, except for his cargo shorts.

In Alien Force, Kevin's mutation wore off and he returned to his human form. He has grown into a tall and muscular young man. In this series, his eyes are now flat black without the black marks around them (as he stopped absorbing energy). During the first two seasons of both Alien Force, he wears a tight black t-shirt over a gray long sleeve shirt, blue jeans, and black combat boots. His hair, though still long, is slightly shorter than when he was younger and is styled into a choppy mullet. During season three, Kevin wears his blue, oil-stained mechanic's jacket over a white muscle shirt, grease-smeared jeans, and his black combat boots. After he goes through his second mutation at the start of season three, the transformation completely destroyed his clothes, except his briefs. As a result, Kevin had to wear an I.D. mask in public to appear human.

In Ultimate Alien Kevin is shown wearing his outfit from the first two seasons of Alien Force.

Personality
When Kevin was eleven years old, he was a criminally insane sociopath, willing to hurt/kill anyone for his own personal gain and/or pleasure. This behavior and mentality stems not only from having been seen and treated as a freak by his peers and family, but also because of the side-effect Osmosians have with absorbing raw energy. His sociopathy and selfishness is made apparent when he was once willing to derail a train in the subway and kill countless passengers, only to cash in on the spoils afterward. As the series progressed, more of Kevin's personality was revealed. It would seem that Kevin had an extremely negative outlook on life because of the countless hardships and struggles he had to endure, feeling insecure about himself as well as having incredibly low self-esteem. He had a deep rooted hatred for other people and society in general; Ben once rebuked him about involving innocent people in his dangerous plans, to which he bluntly replied that "Nobody's innocent! They just haven't had the chance to make fun of me yet!" further emphasizing the negative impact society had on him. In a technical light, Kevin was just as much a victim as any other.

This all changed when he met Kwarrel, a fellow prisoner in the Null Void when Kevin was a prisoner there. Kwarrel was possibly the first and only person other than Gwen to have been genuinely sympathetic and caring towards Kevin, becoming somewhat of a father figure to him which greatly improved his personality, as well as greatly increasing his rage later on in the series when he is informed that Kwarrel was murdered.

In Alien Force, 5 years after the original series, a sixteen year old Kevin is seen. Despite being a con artist and an arms broker, he was noticeably more stable than his younger days; due to his time with Kwarrel, somewhat mature but still had a bit of a jock attitude. As time went on and Kevin was accepted by Ben and Gwen, who were his most hated enemies in the past and now best friend and girlfriend respectively, his personality and psyche improved greatly to the point that he became a trustworthy and reliable ally and teammate. Although Kevin sometimes had relapses of delinquency, Ben and Gwen would look past this as they were now willing to trust him. In the third season of Alien Force, Kevin would once again be mutated by the Omnitrix; involuntarily absorbing feedback from it like the first time and became a living colossus composed of the various solid matter he had absorbed over the past year, including steel, Taedenite, concrete, and stone. During this time, Kevin was visibly disgusted with himself because of his mutation and fluctuated between bouts of uncontrollable aggression and severe depression that almost jeopardized his relationship with his friends, especially Gwen. After the final battle with Vilgax and the destruction of the original Omnitrix, Kevin was restored back to normal and resumed life as a normal looking human. His relationship with his friends further contributed to his mental stability as he once told Ben in Perplexahedron that he was grateful to them for changing his life. Verdona once stated that Kevin's current personality is similar to a younger Max Tennyson's. This, coupled with their rivaling knowledge of alien paraphernalia, makes this claim not that far-fetched.

Though Kevin can be highly cynical, insensible, rude, violent, quick-tempered, greedy (at one point remarking that money is the second most important thing for him), and willing to kill those who hurt his friends and family; he is a good person at heart and generally doesn't like innocent people getting hurt. This is most evident in Andreas' Fault, where Kevin expresses his disgust of how Argit manipulated Andreas and angrily finishes his friendship with him when Argit displayed no sorrow or gratitude for Andreas's sacrifice. Kevin also cared for other people's well-being besides Ben, Gwen, and his family, evident when he helped rescue Ben's mother when she was kidnapped in Hit 'Em Where They Live. Kevin, though he is rarely open about it, also has a sensitive side, as seen in The Con of Rath when Jarrett; the ruler of the Pantophage, ate Tiffin. The scene was so shocking to him that he fainted, despite the fact that he is supposed to be the "tough guy" of the group.

However, things took a sudden turn for the worse when Kevin was mutated once again. Only this time he was driven completely insane, becoming a vengeful and gluttonous monster that matched his grotesque form. Kevin became vengeful against everyone who had ever done him wrong, even if by the slightest fault. He was willing to hurt and kill anyone regardless of the consequences and could not be reached even by his friends, with whom he also vented his rage on. Kevin was unstable even more so than he ever was as a kid by being extremely violent, both physically and verbally. This is evident when he expressed his frustration against Ben the most for being a famous superhero and him being a monstrous freak. Having no control over his actions, Kevin became overwhelmed by an insatiable hunger for energy that unwillingly drove him to kill anyone who he came across to get their energies, regardless if they had powers or not. Even Gwen, who still believed in him, was willing to risk her own life to save him from going down further. At first, Kevin fought for what little self-control he retained by not hurting Gwen because of what they had been before his turning, but his resolve soon waned when he "tasted" her energy and hungered for her as well. Through the combined efforts of Ben, Gwen, Cooper and Darkstar, they were able to revert Kevin back to normal.

Early Life
Kevin Levin was born to Devin Levin and Mrs. Levin. Devin; an Osmosian and a Plumber, was the partner of Max Tennyson. Sometime after Devin's death, Harvey Hackett came into their lives. Harvey fell in love with Mrs. Levin and married her, thus becoming Kevin's step-father; Kevin was only 4 years old at the time. Kevin wasn't fond of Harvey at the very least, especially since he saw him as a replacement of his deceased father as well as an obstacle for his mother's love. Harvey tried to be a good father figure to Kevin, he accepted and raised Kevin as his own, but it was undeniable that he was fearful of him because of the boy's powers, which only worsened their relationship. When he was eleven years old, Kevin somehow absorbed raw energy and demolished their old home. This, coupled with the mental instability from absorbing the energy and his initial dislike of Harvey, instilled in him the delusion that Harvey convinced his mother to kick him out in the street (Harvey later admitted that he drove Kevin out of the house because he destroyed their home). Stealing a bike and wearing the padlock around his neck he ran away and made his way to New York where he made his home under the city's abandoned subways.

Ben 10
Season One

Kevin was first encountered by Ben in an arcade, where, after befriending him, he was assaulted by bullies and saved by Ben as XLR8. The two attempt to steal video games from a warehouse and got caught by the police, forcing Ben to reveal his powers to him in order to escape. The two subsequently form a partnership to use their respective powers for personal gain; however, when Kevin rigs two trains (one carrying money and one carrying people) to collide, uncaring that the crash would most likely result in the deaths of several hundred people, Ben suffers a crisis of conscience and breaks off their partnership. Ben became Heatblast, wanting Four Arms, to stop Kevin, but to even the odds, Kevin grabbed onto Heatblast and absorbed his energy and DNA, changing him into an incomplete version of Heatblast. When Ben foils Kevin's plans and escapes, Kevin leaves to use his absorbed powers to get revenge on the bullies that tormented him. But Kevin's absorbed powers disappear and he reverts back to his regular form.

When Ben showed up as Four Arms to stop Kevin, Kevin absorbed Four Arms' energy and DNA, changing him into an incomplete version of Four Arms. As Ben and Kevin fight, Ben gains the victory and offers Kevin a new home and a chance to be a good guy. Kevin accepts, but Ben realizes he lied and Kevin tries to take the Omnitrix off of Ben, but feedback from it changes Kevin back to normal and appears to have depleted his powers. He escapes and at the end of the episode reveals he still has Heatblast's powers.

Kevin serves as the main antagonist of the second season. His ability to project heat at the end of Kevin 11 is a result of the Omnitrix's feedback pulse: the amount of energy it emitted allowed him to fully absorb its powers, giving him access to every alien form Ben had at the time. However, because Kevin's ability to regulate this power is poorer than that of the Omnitrix itself, the energy suppresses his human form and forces him to remain as an alien most of the time.

As revealed in Framed, Kevin blamed Ben for this, so he used the powers of the Omnitrix to start a inter-state crime spree in America, both for his own benefit and to damage Ben's (or rather, his alien forms') reputation. Eventually, Kevin's ability to regulate the power fails altogether, causing him to permanently mutate into

what Vilgax describes as a "misshapen, chaotic amalgam of creatures from the Omnitrix." Because of this, Kevin fights Ben and as he was about to kill him, Lt. Steel from the Special Alien Capture Team (SACT) shoots him into the water and he is presumed dead, but at the end of the episode he is revealed to be alive.

After his mutation, Kevin gloats that he has all of Ben's original 10 alien powers plus his own, making him "Kevin 11" (the name Kevin is credited under in the ending sequence of the show). The known powers he could use include Four Arms's super strength, Ripjaws's underwater breathing (as he has Ripjaws' gills on his torso) and steel-bending jaws, Upgrade's stretching (as seen in Grudge Match, when he used his tail to slam a tray of Megacruiser food into Technorg's face), Stinkfly's flight (often forgets he can fly) and slime spit, Diamondhead's crystal projections, shape-shifting arm. and invulnerability, Heatblast's pyrokinesis, Wildmutt's sense of smell (as he has Wildmutt's gills on the sides of his face) and XLR8's super speed. Kevin also retained his absorption powers while in this form (as seen in Back With a Vengeance, when he held and redirected the blast from Gwen's plasma gun).

Despite this, Ben observes that Kevin's powers weren't as strong as their pure forms, exactly 1/10th according to Ben (though, in terms of physical strength and durability, he was stronger than Ben as Four Arms and Diamondhead), as seen when Diamondhead was able to catch and crush one of Kevin's crystals with his bare hands while the others shattered upon hitting him (though Kevin only showed this weakness during Grudge Match). This assessment is proven correct in Ultimate Alien as Aggregor stated that when Osmosians absorb the life force of other beings they can only gain the original creature's powers at 1/10 of their original strength without mechanical aid and can only use them temporarily unless they were to drain all of that life form's DNA and energy, including their life force, leaving behind nothing but a shrunken husk.

Season Two
During his third appearance in Grudge Match, Kevin attacked Ben to get revenge, blaming his condition on him. As the two battled, they were abducted and forced to fight in Slix Vigma's gladiator games. During their battles, Ben helped Kevin to realize the advantages of his mutated form: because Kevin 11 was an amalgam of aliens, he could mix and match their powers to make up for their reduced potency (ex: Diamond Head durabillity, Four-arms strength, and XLR8 speed equals "one hard punch"). Although forced to work together, Kevin's only goal was killing Ben. After Ben and Kevin succeeded in escaping, Kevin attacked Ben and trapped him against the wall with Stinkfly's toxic saliva before moving in with Diamondhead's spear hand, gloating that no matter what alien Ben transformed into, he knew every one of them. Little did he know that Ben had discovered that there were more aliens in the Omnitrix and had unlocked Cannonbolt, whom he transformed into just as Kevin was about to skewer him before getting into an escape pod. Kevin nearly barged into the pod when he was stopped by Technorg, whom Ben had spared and he declared a life debt to. After Technorg helped Ben escape, he turned his attention to Kevin (who had called him a lap dog just as he was about to kill Ben). The two were transported to a different galaxy at the end of the episode while locked in combat. According to the advanced edition of the episode, Technorg beat up Kevin and left the ship to return to his home world while Kevin took the ship as his own.

Kevin returned in the episode Back With a Vengeance, where he teamed up with Vilgax to defeat Ben, and eventually managed to remove the Omnitrix with Vilgax's help. However, he betrayed Vilgax later in an attempt to leave both Ben and Vilgax in the Null Void and use the Omnitrix to take over the world, only for Ben to escape and leave him and Vilgax trapped instead. Kevin spent the rest of the series in the Null Void.

Dream Kevin
A dream version of Kevin appears in Perfect Day, as a hall monitor of a dream version of Ben's school. In the dream, Kevin was human but then changed into his mutated form (which, with it's Ripjaw's mouth and teeth more pronounced than usual, appeared uglier than it used to be, probably emphasizing of Ben's fear of Kevin) and fought Ben. When Ben took control of the dream, he was then able to defeat the dream version of Kevin in one fell swoop.

Ben 10: Alien Force
Season One and Two

Kevin comes back in Ben 10: Alien Force, where he was eventually released from the Null Void (he stated in Darkstar Rising that he did his time for his crimes) returned to his human form, and grows into a tall and muscular young man who has rejoined society and reconciled with his family. He has also become an alien weapons dealer, giving him several contacts with criminals (such as Argit, Vulkanus and Sunder the Retriever) as well as a considerable knowledge in alien tech. He has also regained his ability to absorb solid matter.

In his first Alien Force appearance, Kevin attempted to organize a deal between the Forever Knights and the DNAliens in order to sell them level 5 weapons. However, the deal was interrupted by Magister Labrid, Ben and Gwen. Trying to get revenge, Kevin fought Ben, but was easily defeated while the other villains escaped without paying him. Labrid then forced Kevin to help them in finding back the weapon, offering him to avoid problems with the Plumbers then. Though Kevin mainly accepted in order to get his pay, Magister Labrid later sacrificed himself in order to save him from a defective weapon's explosion. This, plus Kevin's interest for Gwen, his promise to Magister Labrid, and his desire to start a better life and become a Plumber like his father, led him to agree to teaming up with Ben and Gwen against the High Breed invasion. It "mostly" served as the reason that he joined the Tennysons in the first place (his promise to Magister Labrid and Gwen could be the other reasons).

Though he initially still felt a little rancorous toward Ben, Kevin slowly reconciled with him, and he proved to be a valuable ally as well as a good friend. Despite his reformation, Kevin still tends to engage in unethical activities: he is not above stealing gold and jewelry from the Forever Knights and Plumbers equipment from Manny Armstrong and Helen Wheels when presented with the opportunity.

In Ben 10 Returns and Plumbers' Helpers, attempts to sell the Rust Bucket to Vulkanus for alien technology, albeit technology he intended to give to Ben (Kevin's Big Score); and conspires with Argit to sell weapons to both sides of a warring race.

In Darkstar Rising, he reveals that his father was also a Plumber. He never met his father, but his mother told Kevin stories about what his father did. This is a big gap in the original series because in Ben 10, he said that his parents both left him because of his strange electrical powers; this was explained later on in the series as an exaggeration on Kevin's part: Kevin's mother remarried, and in retaliation Kevin destroyed their home which lead to his stepfather driving him out of the house. At the end of the same episode, Kevin, along with Gwen and Ben became official Plumbers, after which Kevin leaves to tell his mother about his membership, this suggests that he has now reconciled and rejoined with his family. Also in Darkstar Rising, when explaining that he wanted to be a Plumber for the sake of being just like his father, it "mostly" served as the reason that he joined the Tennysons in the first place (his promise to Magister Labrid and Gwen being the other reasons).

Season Three
In Vengeance Of Vilgax Kevin changed clothes and was subjected to a feedback pulse from the Omnitrix after Ben tampered with it. Because of this, he was unable to revert back to his normal human form, instead becoming a living colossus composed of different elements, including steel, taedenite, concrete, and what appears to be wood or quite possibly the stone he absorbed from the cliffs in Inside Man.

Throughout the series he was shown to hate what he had become, to the extent of breaking things off with Gwen (much to her dismay), wearing an I.D. Mask in public to appear human, and considering himself a monster. He also discovered that his father Devin Levin, an Osmosian Plumber, was murdered by an alien criminal named Ragnarok, and became bent on vengeance, so much so that he eventually left Ragnarok to his death when he had the chance to save him.

In the series finale The Final Battle, where Vilgax attempted to separate Ben from his friends, Kevin was kidnapped by Albedo in an attempt to split them up. He was also asked by Ben to back him up when taking on Vilgax, which he did. After Ben's Omnitrix was destroyed, he reverted back to human form, revealing that it was the Omnitrix's power that kept him that way. This is also when Kevin and Gwen share their first on screen kiss.

Ben 10: Alien Swarm
In Ben 10: Alien Swarm, the live-action movie, Kevin is seen driving around with his car. The car is a green 2009 Dodge Challenger. Also he is seen in his human form, with his Season 1-2 clothes and regular absorbing powers. Whenever he absorbs solid objects, his voice sounds distorted. Near the climax he switches to his season 3 clothes revealing that they're a uniform for the garage built on top of a Plumber's base as cover.

Ben 10: Ultimate Alien
Kevin returns in Ben 10: Ultimate Alien, going back to his original Alien Force appearance, clothes and powers. Ultimate Alien focuses more on Kevin's past, including how he managed to return to his human form, break out of Incarcecon, and escape the Null Void after the original series, as well as his back story prior to the original series. Kevin still has the ability to change his hands into different weapons even after he returned to normal in Alien Force.

Kevin and Ben no longer share their famous rivalry and instead have become true friends. Kevin acts as an older brother towards Ben. They care genuinely for each other. Kevin is much more open about his feelings, showing gratitude and tries to express it to both Ben and Gwen (mostly Gwen). Gwen and Kevin continue their romantic relationship. He also seemed to have a better connection towards his friends' paternal grandfather, Max Tennyson.

In Too Hot To Handle, Kevin is able to repair objects in the current matter he has absorbed by releasing a liquid version of that substance and then hardening it again. He can also manipulate whatever matter he is touching by absorbing it and then morphing it into any shape or form he wants. He uses both abilities when he fixed the broken seal of P'andor's suit, morphed it around his body to trap him, and fused the arms together as makeshift handcuffs.

In Fused, he admits he was selfish when he first met Ben. He also risked his life to save Ben from being taken over by Ra'ad. He also learns that there is another Osmosian named Aggregor. While never explained, Kevin shows sympathy to him because they are of the same race and because Kevin, like Aggregor, was once an insane and violent sociopath due to him having improperly used his powers when he was a child.

In Ultimate Aggregor, he shows his knack for detective work, and later warned by Professor Paradox to remember who his friends are and that things will get worse before they get better. Kevin explains to Aggregor that the reason that he was a villain in the original series is that when Osmosians absorb raw energy, they become insane.

In Map of Infinity, Kevin continues to focus on stopping Aggregor (but not more than Ben), Kevin is easily defeated by Aggregor since his powers have increased, Kevin also seemed to know about the Map of Infinity saying it did not exist, the group go in search of the first part of the Map, Kevin wears a Plumbers' Suit, unlike any other Plumbers' Suits, that Kevin had a little white glove and a circle over the glove (which gives access to Ultimatrix of Ben), possibly this glove is for Kevin to use his powers, he proves to be very strong when a giant hammer crushes the group on a wall,he survived and managed to save the group and remove the hammer from the wall.

In Deep, we see Kevin using a Plumbers' Suit with built-in electrical weapons. His helmet is destroyed, but



Gwen uses her powers to make Kevin absorb the matter of his jet, saving him from being crushed by the pressure. However, Kevin still can not breathe, until a Little Fish acts as a "helmet" for him to breathe, in the core Kevin takes the Little Fish from his head (he did not need it since there was air in the core), Kevin also finds and tries to fight Aggregor it to retrieve the second part of Map of Infinity, unfortunately he is easily defeated by the electric powers of Aggregor, Aggregor says that next time Kevin should try absorbing something non conductive, and runs away with the second part of Map of Infinity, leaving Kevin angry. Kevin leaves the Little Fish (who liked Kevin) in Piscciss and is comforted by Gwen at the end, as he seemed to miss the fish.

In Perplexahedron, When Ben and Kevin get separated from Gwen, Ben says that Gwen can take care of herself and Kevin replies, "That's why I like her." Kevin then talks about his feelings to Ben and how he owes it to them (Ben and Gwen) for putting him on the right path. After finding Gwen (by accident), Kevin tries to say that he likes her, a lot. Then Ben tells her what Kevin's trying to say, and Gwen says, "I know that already." and they kiss, the second kiss in the Gwen/Kevin relationship.

In The Forge of Creation, as a last resort to stop Aggregor from succeeding in his plans, Kevin absorbs the powers and abilities from the Ultimatrix's unlocked aliens, becoming strong and powerful enough to defeat Aggregor. Unfortunately, this also causes him to mutate and become insane once again as Ultimate Kevin His old desire for power also returns as he absorbs Aggregor's abilities as well. However, Kevin's good heart appears to not be taken over completely, as he accepted 10-year-old Ben's harsh criticism before sparing Aggregor's life, though he declares he will not be so merciful tomorrow.

The known powers Kevin has in this form include Four Arms's/Manny's/Humungousaur's/Ultimate Humungousaur's super strength, Jetray's neuroshock blasts, Brainstorm's force fields, Swampfire's plant generation/manipulation, Rath's wrist claw, Diamondhead's crystal shards, shape-shifting arm and invulnerability, Goop's liquefaction and stretching, P'andor/NRG's heat rays, Big Chill's flight, ice vapors, and intangibility, Bivalvan/Water Hazard's water blasts, Galapagus/Terraspin's aerokinesis, Lodestar's magnetic control, Chromastone's ultraviolet blasts, Ultimate Spidermonkey's web spit, Andreas/Armodrillo's ground pounding, Swampfire/Ultimate Swampfire/Alan's pyrokinesis, Helen's super speed, Pierce's spike generation, Brainstorm/Ra'ad/AmpFibian/Benvicktor/Dr. Vicktor's electric blasts, Jetray/Dr. Vicktor's space survival and Gwen's Anodite abilitys, though there are many others he had not shown. Dwayne comfirmed he had all the powers of all the Ultimatrix aliens, so he must have Big Chill/Ultimate Big Chill/Brainstorm/Ra'ad/AmpFibian/Water Hazard/Bivalvan's underwater breathing, Echo Echo's duplication, Goop's acid, Humungosaur's size changing, Jetray's hyperspace ability, Nanomech's shrinking and lasers, Spidermonkey's tail webs, Swampfire's regeneration, Upchuck's eating abilities, Way Big's cosmic rays and storms, Ra'ad/AmpFibian's streching, Ripjaws's jaws and legs transformation, Ultimate Big Chill's ice flames, Ultimate Echo Echo's sonic discs and Ultimate Humungosaur's missiles.

In Nor Iron Bars a Cage, it is revealed that back during his time in Incarcecon, a prisoner named Kwarrel approached him and offered to help him control his anger and find a purpose, after that he learned how to use its power as shown in Ben 10: Alien Force. Seeing the con as a father figure, Kevin learned how to return to his human form and how his powers could

allow him to absorb matter instead. Kwarrel then showed Kevin a tunnel he had been digging out of the prison to freedom. However, they were ambushed by Morgg who would one day become the warden. Kwarrel held off the guard for Kevin to escape, only to lose his life in the process. Out to avenge his death, even though it went against all that Kwarrel had taught

him, Kevin purposely returned to the prison to kill Morgg. He very nearly succeeded if not for Ben and Gwen's interference. Believing that their friend is truly gone, Ben, much to Gwen's horror, suggests that Kevin must be put down.



In The Enemy of My Enemy, Kevin went after Argit for all the times he double-crossed him. He first attacked him and sent him towards Ben and Gwen. He later attacked the Rust Bucket 3 in order to get Argit, but was forced to retreat due to his car being thrown off the plane. He then attacked the Plumber's Academy and easily took care of the Plumbers. He then attacked and thought he killed Argit (due to Argit closing down his vital systems). During his attempt to kill Argit, he nearly kill Gwen, thinking she betrayed him. However, he restrains himself at the last second and spares her life, saying: "The only reason you're alive is because of what you used to mean to me." before departing, making is clear that a part of Kevin still cares about her and Gwen remaining adamant that they can still bring Kevin back to sanity without killing him.

In Absolute Power, in hopes of trying to persuade Kevin to rejoin Ben and the gang, Gwen inquires the aid of Darkstar. However, Ben is very furious with the idea. This is Ben and Gwen's last hope of trying to bring Kevin back. Gwen tries to talk to Kevin, who tells her he's been avoiding her because he can't control himself, implying that he doesn't want to hurt her; but he gains the desire to absorb Gwen's powers after taking a "taste".

After Ben defeated Kevin with Ultimate Echo Echo, Cooper finished the machine that would siphon all of the energies that Kevin had absorbed and subsequently cure him with it. Darkstar then betrays the team by using the piece of the Dominus Librium to transfer all said energies into himself, which backfires when Ben;

anticipating such a move, activates a switch to return all of the energies back to where they belonged, Kevin then knocks him out with a punch. Kevin, now back to his human form and of sane mind once again, thanks Cooper. He is then given a passionate kiss on the lips by Gwen (much to the disappointment of Cooper) and gets into a argument with Ben about their previous fight, to which he is relieved that everything turned out alright, after which Gwen asks for their help in explaining to her parents about the damage done to their home, to which Kevin and Ben ditch by voting to go to Mr. Smoothies instead, with Kevin buying.

Alternate Future
In the non-canon episode Ken 10, which takes place during the Ben 10,000 timeline, Kevin was trapped in the Null Void for 32 years. Kevin managed to break out of the Null Void several times. During one of his breakouts, he had his son Devlin with a girl on a Saturn colony.

During his time in the Null Void, Kevin absorbed the powers of the 11,000 aliens and monsters trapped with him. This allowed him to turn into a new monstrous hybrid form even powerful than the original one(strong enough to allow him to shrug off multiple direct blows from Way Big), transforming him into Kevin 11,000. The known powers he can use in this form include his own ability to absorb matter and energy, Four Arms' super strength and durability, Heatblast's pyrokinesis and shape-shifting tentacle, Stinkfly's flight and slime spit electric shocks from his left tentacle, Benwolf's sonic howl, XLR8's super speed. Having completely mastered his powers, Kevin can now switch between his human and mutant form at will and even access some of his absorbed powers in human form to a limited extent, including XLR8's super speed and Four Arm's super strength and durability.

The episode begins with Ben's son Ken celebrating his tenth birthday, and to commemorate the occasion Ben gives him an Omnitrix of his very own. However, he equips it with a limiter, unwilling to trust his son with the power of the Omnitrix or to defeat villains on his own. Ken soon befriends a boy named Devlin, and the same night Kevin 11 attacks (actually Devlin, who has the ability to shift between his human form and his father's first mutant form at will). Unable to locate the Null Void, which Ben had moved after the events of Ben 10,000, he retreated.

Ken, also unaware of the move, endeavors to find it on his own, only to unwittingly lead Devlin, who is Kevin's son and can transform into his father's mutant form, right to it. Devlin releases his father from the Null Void, but is soon heartbroken to learn that Kevin's only interest is fighting Ben, not seeing his son. Kevin is ultimately defeated by the combined forces of Ben, Ken, and Devlin Levin, to which Devlin, who was kicked out of his family, now hated his father and is later adopted into the Tennyson family after he saves Ben and his son Ken from Kevin's sneak attack. Just before that, Kevin 11,000 was shown to be at the mercy of Ben, as Way Big, who has lost his temper when Kevin injured Ken and Devlin, and proceeds to viscous beat him. However, Kevin (now in his human form) manages to shrug off the attack with little more than a crick in his neck. Devlin manages to sneak up behind him and traps his father in a Null Void Capsule, which he then gives to Grandpa Max, who, before departing, says "I've got a special place for you this time!", indicating that Kevin will be imprisoned in a special high-security prison instead of the Null Void this time. However, considering how many times he's escaped the Null Void, it is very likely that he will manage to escape from his prison.

Powers and Abilities
Energy Absorption

Kevin is descended from a species of parasitic aliens known as Osmosians. Kevin, like all Osmosians, have the unique ability to absorb the energy and matter of anything though his body at will and utilize it in various ways.

In Ben 10, Kevin's powers were believed to be an unexplained mutation. During Alien Force, Kevin claimed that his powers were of alien origin. The later theory is proven correct in Vendetta, were it is revealed that his powers were inherited from his deceased father, Devin Levin, who was an Osmosian. As such, Kevin has the ability to absorb the energy and matter of anything through his body at will and utilize it in various ways. This includes, but is not limited to, electricity (and possibly any energy within the electromagnetic spectrum), the powers, abilities, and memories of other life forms (via absorbing their metabolism, life force, and DNA), fire, water, plasma, and the mass and physical properties of solid matter. Since everything contains either energy or matter, there is no limit to what he can absorb.

Kevin can absorb electricity and use it activate, overload, and manipulate machinery on physical contact. He can even channel the energy though his hands to discharge it as a powerful energy blast, use it to enhance his strength or use it to increase his cellular regeneration, thus allowing him to recover from injuries at an accelerated rate. However, the energy will dissipate over time or though excessive use, so he is required to recharge.

After his mutation, Kevin gloats that he has all of Ben's original 10 alien powers plus his own, making him "Kevin 11" (the name Kevin is credited under in the ending sequence of the show). The known powers he could use include Four Arms' super strength, Ripjaws' underwater breathing (as he has Ripjaws' gills on his torso) and steel-bending jaws, Upgrade's stretching (as seen in Grudge Match, when he used his tail to slam a tray of Megacruiser food into Technorg's face), Stinkfly's flight and slime spit, Diamondhead's crystal projections, shape-shifting arm. and invulnerability, Heatblast's pyrokinesis, Wildmutt's sense of smell (as he has Wildmutt's gills on the sides of his face), XLR8's super speed, and possibly Ghostfreak's invisibility and intangibility, and Upgrade's plasma beam (though he did not use their powers during the series as he favors brute force over strategic tactics). Kevin also retained his absorption powers while in this form (as seen in Back With a Vengeance, when he held and redirected the blast from Gwen's plasma gun).

Despite this, Ben observes that Kevin's powers weren't as strong as their pure forms (though, in terms of physical strength and durability, he was stronger than Ben as Four Arms and Diamondhead), as seen when Diamondhead was able to catch and crush one of Kevin's crystals with his bare hands while the others shattered upon hitting him (though Kevin only exploited this weakness during Grudge Match). This assessment is proven correct in Ultimate Alien as Aggregor stated that when Osmosians absorb the life force of other beings they can only gain the original creature's powers at 1/10 of their original strength without mechanical aid and can only use them temporarily unless they were to drain all of that life form's DNA and energy, including their life force, leaving behind nothing but a shrunken husk.

As said Ultimate Aggregor and demonstrated in "The Forge of Creation", if an Osmosian were to absorb raw energy (such as the energy of Omnitrix, Ultimatrix, or the Andromeda Aliens after their bodies were converted into energy) it will cause them to become mentally unstable, which explains Kevin's violent, sociopathic behavior in the original series. As seen in "Escape From Aggregor" and "Absolute Power", Osmosian's are parasitic by nature and feed off the life force and metabolism of other life forms as their primary source of sustenance. However, if they were to absorb pure energy (such as electricity or the energy of the Omnitrix or Ultimatrix) and cannot control it, their normal method of feeding turns into an addiction, causing the Osmosian to become mentally unstable and insatiable, forcing them to seek out any possible source of energy to feed off of. Storing energy they have absorbed for long periods of time without discharging will only worsen their instability. Dwayne McDuffie has stated that it is both psychologically and physically difficult for Osmosians to discharge all of the energy they absorb since it is both pleasurable to them and is a form of sustenance.

Despite this, there are in fact three known ways to cure an Osmosian of their insanity. One is to simply let the energy dissipate on its own without absorbing extra energy (though considering energy is metaphorically an addictive drug for Osmosians, this is extremely unlikely, although Kevin 11 managed to do this under the guidance of an inmate named Kwarrel after being imprisoned in Incarcecon). Another method is for the Osmosian to quickly discharge all of the energy they have absorbed before it begins to warp their mind (though Devin is currently the only known Osmosian able to do this). The third option is to forcibly drain/siphon of all of the energy the Osmosian has absorbed, as Ultimate Kevin did to Ultimate Aggregor at the end of The Forge Of Creation (using his natural absorption powers) and as Ben's team did to Ultimate Kevin at the end of Absolute Power part 2 (using a fragment of the Dominus Librium). It is currently the most effective method of curing an Osmosian of their insanity and energy cravings.

Power Absorption
See: Kevin's mutations

By absorbing the DNA, metabolism, and life force of other life forms, Kevin can acquire 1/10 of that creature's powers without mechanical aid (this is the biological limit for Osmosians) and undergoes a slight mutation to accommodate the absorbed abilities (this did not happen when he absorbed the energy of the Omnitrix as he absorbed the watch's transformative energy which caused him to partially transform into Ben's currently selected alien). Also, the absorption process will more often than not leave his victim dead If he were to absorb the energy from the Omnitrix or Ultimatrix, the transformative energy will cause him to mutate him into a chimeric fusion compromised of most, if not all of the aliens in Ben's current lineup.

Matter Absorption
In Ben 10: Alien Force Kevin returns in human form with his absorption powers intact. However, he is now also able to absorb the properties of materials into his own being (e.g iron, copper, rock, nickel), transmuting himself into a living form of whatever material he has absorbed and subsequently use it to proportionately increase his physical strength and durability. It is revealed in the episode All That Glitters that the transmutation actually serves as a second skin that peels away as he takes damage. However, while fighting a Techadon, the war robot blasted a hole straight through Kevin in rock/concrete form, but he demonstrated minor regenerative abilities by absorbing metal to cover the hole. In the episode Plumbers' Helpers, Kevin can absorb multiple materials at once, as demonstrated by absorbing both nickel, copper and zinc (from loose change in his pocket). He requires a decent amount of material to completely encase himself (objects the size of marbles are only able to produce a coating large enough to cover one of his hands while a Taedenite crystal twice the size of his hand is sufficient to coat his entire body). This ability has once been used productively when Kevin was forced to synthesize a coating of a living gem known as Taedenite, thus incapacitating him; Vulkanus mentioned that it's the rarest gem in the galaxy, and with the amount he chipped off from Kevin he was able to buy a permit to "renovate" the Earth, and Paradox mentioned in Vilgax Attacks that with the amount Vulkanus chipped off of Kevin he has the largest stash in the galaxy.

In the Alien Force season 3 premiere, Kevin loses the ability to revert to his human form after a feedback blast, caused when Ben tampers with the Omnitrix and Kevin tries to remove it to help Ben, turning him into a living colossus composed of the various solid matter he had absorbed, including steel, Taedenite, concrete, and stone. In addition, Kevin's previous super strength and durability is further enhanced and he gains limited regenerative and shape-shifting abilities, seen when he shifts his limbs into a variety of different tools, such as a mace, a hammer, a sword, and large clippers. In The Final Battle: Part 2, he was turned back to normal after the Omnitrix self-destructed. In Ben 10: Ultimate Alien, Kevin still retains his regenerative and shape shifting abilities after his mutation is reversed due to him now having knowledge of being able to doing so.

In Too Hot To Handle, Kevin's abilities have shown to develop more, allowing him to repair objects of the current material he has absorbed either by turning it into a liquid or releasing a liquid version of whatever material he has absorbed. While absorbing matter, he can momentarily merge with the actual matter and manipulate the substance he has absorbed. Both abilities were used when he repaired the rock ceiling of a mine, fused the seal of P'andor's suit, morphed it around P'andor, and fused the arms together as makeshift handcuffs. In The Creature From Beyond, he used some of the metal he absorbed to create a helmet for Gwen to prevent the Lucubra from controling her mind. Kevin can easily pick looks, using his powers to absorb the material of the lock, then form his finger into a key.

Kevin also has the ability to absorb liquids, and when he does he gains the properties of that liquid (e.g. if he absorbs mud, objects will pass through him without causing physical damage). It is also possible that Kevin could breath underwater for brief periods of time by diffusing dissolved oxygen from the water and into his bloodstream.

Other Skills
Even without his powers, Kevin is shown to be far stronger than an ordinary human. While not to the same extent as aliens like Four Arms and Diamondhead, Kevin is capable of lifting throwing the combined weight of several people with little strain. He is also capable of resisting impacts and blunt force trauma that would severely injure an ordinary person with moderate discomfort.

Kevin has some noticeable skill in martial arts which he gained during his years as a runaway, a prisoner in Incarcecon, an alien tech dealer, and a member of the Plumbers. Even when he was only eleven, Kevin proved on several occasions to be a highly formidable fighter, having held his own against and defeated opponents such as the Megacruiser robots, Technorg, and even Vilgax in a one-on-one fight, something that Ben couldn't do.

Despite lacking a proper formal education, Kevin possesses a vast scientific and technological knowledge of alien paraphernalia; he even once mentioned that he learned Astrophysics on the streets. In episode Deep, when Kevin, Ben, and Gwen travel to planet Piscciss, an event occurs when a large sea creature attacks their ship and steals Gwen. Ben and Kevin both argue that they both cannot use their powers while being in their plumber suits. So Kevin made some alterations to the suits, equipping them with propelling units and neural shock pulses that allow them to attack with electric shocks with every blow they make. Kevin also has great deductive skills, having been able to determine specifically what happened in a battle between Aggregor and the Plumbers several hours after the battle, greatly impressing his friends and even gaining a compliment from an experienced Max.

Kevin is a very good driver, being able to race and chase in his car and the Rust Bucket 3. He is a skilled driver both on land or air. Racing is one of the things he's fond of as in Paradox, it is said that he often drag race at night on the out skirts of Los Soledad for fun. This is also shown as he collects speeding tickets and is fond of holding his own personal record much to Gwen's dismay. Sometimes Ben is bothered by Kevin's very fast driving, hoping he could drive on his own. Kevin is great at mechanics. He is shown to repair his car for the numerous damage it took during the course of the series. He also modified his car, setting alien tech for beneficial gears. A running gag in the series is how Kevin's car gets damaged or destroyed in one way or another during battle (Kevin once alluded this during a fight with Sunder when he said: "What is it with everybody wrecking my car?!" after Sunder damaged the hood of his car with his axe). On top of that he built the DX Mark 10, a car that he (reluctantly) gave to Ben as his sixteenth birthday present.

Love Interests
See: Kevin Levin/Love Interests

Video Games
Kevin appeared in every version (Wii, DS, PSP, PS2) of the game as the villain at the end of the Lumber Mill level and the second mini-boss in the secret challenge of the Null Void level.
 * Ben 10: Protector of Earth (Villain)

Kevin appeared in every version (Wii, DS, PSP, PS2) of the game, like the previous game. Unlike the previous game, Kevin is playable only on the Wii, PSP and PS2 version of the game. He is playable for 2 levels, and for 1 level he was taken over by a Xenocyte and became the boss for that level.
 * Ben 10: Alien Force (Playable Character And boss)

Kevin appeared once again in every version (Wii, DS, PSP, PS2, Xbox 360) of the game. He is not a playable character in any of the versions.
 * Ben 10 Alien Force: Vilgax Attacks

Kevin appeared as the first boss where he was taken over by the Techadon gauntlet.
 * Ben 10 Alien Force: The Rise of Hex

Kevin is seen in most of the clips in between levels.
 * Ben 10 Ultimate Alien: Cosmic Destruction

Toys
Ben 10
 * 4 inch Alien Collection normal Kevin 11
 * 10 cm DNAlien mutant Kevin 11
 * Sumo Slammers mutant Kevin 11

Ben 10: Alien Force

 * 4 inch Alien Collection normal Kevin 11
 * 10 cm DNAlien normal Kevin 11
 * Kevin's battle cruiser (car) - includes metal Kevin 11

Ben 10: Ultimate Alien

 * Ultimate_Kevin_Toy!.png inch Alien Collection normal Kevin 11 (unreleased)
 * 4 inch alien collection Ultimate Kevin (May)
 * Rustbucket III Piece 1 Vehicle

Trivia

 * Kevin is the first character to have an episode named after him.
 * When someone asked that if Kevin can grow wings out of his back (in armored form), Dwayne McDuffie confirmed that he can but he can't fly using them, so besides Max, Kevin is only one of the main characters without his own way of flight.
 * Kevin is the only Plumber kid to ever beat Ben in a fight, Pierce not counting because Ben let him win.
 * All the times Kevin was the main character of any episode involves either revenge or has something to do with his mutations.
 * Kevin is the closest character to have as many love interests as Ben (just one short). However, it is revealed in Revenge of the Swarm, that he had some girlfriends before Gwen (he was afraid to tell her), that technically means he has had the most love interests than anybody in the show.
 * For some reason, Kevin shifts between favoring his left and right hand throughout the series, indicating that he could be ambidextrous.
 * Kevin has shown a willingness to kill, most likely attributed to his own harsh life, but he starts to develop not to do this.
 * Kevin has mutated three times in all three series. First from the original Ben 10, then again in Ben 10: Alien Force and most recently in Ben 10: Ultimate Alien. He has only become insane during his first and third mutation though. This is because during the first and third mutations he had absorbed energy, which causes Osmosians to become mentally unstable.
 * Kevin and Gwen find Rath as the most entertaining alien in Ben's arsenal.
 * Dwayne McDuffie confirmed that Kevin had every power that Ben unlocked in his Ultimatrix during his third mutation and that "he just never got around to using the hundreds of powers he absorbed".
 * Despite having proficiently good skills in unarmed combat, Kevin is rather ignorant with his array of powers during his first and third mutations, relying only on the abilities that had the most strength (a trait he shares with Ben). It wasn't until he realized the possibilities of his powers that he was able to become more creative in using them to a much greater and dangerous degree.
 * Kevin's car is faster than Ben's as shown in the episode The Transmogrification of Eunice.
 * Kevin loves watching soap operas.
 * Kevin did not go insane after going through his second mutation in because he didn't actually absorb the energy feedback of the Omnitrix; rather the Omnitrix rewrote his Osmosian DNA when Ben tampered with it to unlock the master control.
 * Kevin and Gwen have kissed three times on screen. Twice in Ben 10: Ultimate Alien and once in Alien Force.
 * Kevin's full name is Kevin Ethan Levin, as shown in War of the Worlds: Part 1.
 * Kevin's original hometown is Bellwood, but he ran away to New York after destroying his family home.
 * Kevin is the first villain in the series to be of Osmosian descent (though he is technically half-Osmosian). The second is Aggregor, who is a full Osmosian.
 * Kevin's very first crime was stealing a motor bike and used it to run away to New York.
 * The rings Kevin had around his eyes in the original series are a visible sign that an Osmosian has recently absorbed energy, as he no longer had them after he started absorbing solid matter (though he did have them around his eyes after absorbing a shard of energy-charged Taedenite in Kevin's Big Score). This is further evident in Ultimate Alien, as Aggregor (an Osmosian warlord who regularly absorbed energy) had similar rings around his eyes as well and retained them after absorbing the powers of the Andromeda aliens (as he converted their bodies into pure energy to fully absorb their powers).
 * Kevin is the only member of Ben's Team not to have an "evil twin", as Ben has Albedo, and Gwen has Sunny, though he has been compared to Darkstar.
 * It is shown in It's Not Easy Being Gwen that Kevin does not go to high school, although he may already be past that level considering his intelligence (though he prefers to revel in his strength). Gwen later agrees to help him achieve a GED.
 * Dwayne McDuffie confirmed that Kevin is in love with Gwen.
 * Kevin and Ben have always wore the same outfit every episode since Ben 10 Alien Force, except when Kevin mutated in to Ultimate Kevin.
 * Do to his second mutation Kevin's super strength and durability have enhanced to a level equal or more than Swampfire.