Kevin Levin (Classic)

Kevin Ethan Levin (voiced by Michael Reisz in his first appearance, Charlie Schlatter in his following ones, and by Greg Cipes in Ben 10: Alien Force) is a mutant with the ability to absorb any type of energy and release it at will, though he seems only able to release electricity, or he may simply favour this due to it's offensive potential. The energy can be used to activate or overload various machines and can also be used to make energy blasts.

Ben 10
Kevin was abandoned before the start of the series due to his powers, and has been alienated ever since, this has lead to him developing anti-social behavior disorders that border on sociopathy, however, he is reformed over the course of Ben 10 Alien Force, and rejoins society and apparently recociles with his family. When absorbing energy from the Omnitrix's aliens, he becomes an incomplete, but effective, version of that alien. In his first appearance in "Kevin 11", he is first encountered by Ben in an arcade, where he was assaulted by bullies and saved by Ben as XLR8. The two attempt to steal video games from a warehouse and get caught by the police, forcing Ben to reveal his powers to him in order to escape. Eventually, Ben breaks off their partnership when Kevin rigs two trains to collide, not caring that hundreds of innocent people would be killed. He then absorbed the abilities of Heatblast and Fourarms, using the former form's powers to get revenge on those who had wronged him. He absorbed the latter form's powers during his second battle with Ben to even the odds. After trying to take the Omnitrix from Ben, the Omnitrix emitted a feedback pulse to prevent Kevin from taking it, seemingly neutralizing his power. Kevin, however, exhibits the ability to create flame at the end of the episode.

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 crime spree in Los Angeles, 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 would describe as a "misshapen, chaotic amalgam of creatures from the Omnitrix." This form has:

Fourarm's head, body, left eyes and legs Grey Matter's right eye Upgrade's upper back Stinkfly's wings Diamondhead's right arm Heatblast's left arm Wildmutt's arms below them Ghostfreak's lines XLR8's tail Ripjaw's' antenna, gills, and teeth

After his mutation, Kevin gloats that he has all of Ben's powers plus his own, making him "Kevin 11" (the name Kevin is credited under in the ending sequence of the show). Despite Kevin's claim, Ben notes that Kevin's powers are only one-tenth as strong, (although this assessment may not be accurate) and Kevin never exhibits his original powers in this form (the same is true for Ghostfreak, Upgrade (though this is debatable when Kevin used XLR8's tail to slam a tray of Megacruiser food into Technorg's face), Grey Matter, or Wildmutt. Kevin's form also limits his ability to use the special powers of his alien forms. Being a random fusion of aliens, Kevin only has access to the powers most prevalent in his form. In addition to these limitations, Kevin seems unable to use the powers of any aliens Ben has gained since their original encounter.

During his third appearance in "Grudge Match", Kevin attacks Ben to get revenge, blaming his condition on Ben. As the two battle, they are abducted and forced to fight in Slix Vigma's gladiator games. During their battles, Ben helps Kevin to realize the advantages of his mutated form. Because Kevin 11 is an amalgam of aliens, he can mix and match their powers to make up for their reduced potency. Although forced to work together, Kevin's only goal was killing Ben. He is transported to a different galaxy at the end of the episode while locked in combat with Technorg, who beat him then escaped. He then took the ship as his own.

Kevin returns in the episode "Back With a Vengeance", where he teams up with Vilgax to defeat Ben, and eventually manages to remove the Omnitrix. However, he betrays Vilgax later in an attempt to leave both 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.

Possible future
In "Ken 10", Kevin returns after thirty-two years of imprisonment in the Null Void (though he has been sent in and out several times prior to the episode), having been set free by his son, Devlin Levin. Devlin was born after one of these escapes in which Kevin fled to a colony on Saturn, where he started a family before being captured again. Kevin has now fully mastered his powers and can return to his human form. In his human form, he can also utilize the powers he has absorbed to a limited extent, such as XLR8's speed, without having to transform into that alien, and is able to simply shrug off an intense beating from Way Big. His mutated form, though still an amalgam, has changed considerably from his continued absorption of alien DNA, leading to his new title of "Kevin 11,000". Eager for revenge and having not so much as a care for his son, despite Devlin's role in releasing him, Kevin proceeds to beat on Ben and his son, Ken. Ironically, it is Devlin who stops him, trapping his father back in the Null Void. In "Ken 10", Kevin returns after at least thirty years of imprisonment in the Null Void, having been set free by his son, Devlin. Kevin has now fully mastered his powers and can return to his human form. In his human form, he can also utilize the powers he has absorbed to a limited extent, such as XLR8's speed. He still has Wildmutt's arms, Stinkfly's wings, and Fourarms' legs, he now has:

A Heatblast-like head, body, left wing and right tentacle, but black instead of red. A left tentacle that splits in the middle into a Fourarms' arm and a tentacle with Upgrade and XLR8 tail markings Several grey tentacles (similar to the tentacles of the Null Voiders featured in "Truth" and "Back With a Vengeance") protrude from his lower body. He also is able to send out sonic howls similar to that of Benwolf Wildmutt's arms Stinkfly right wing Fourarms' legs  Image:Kev11000.jpg|Kevin 11,000 transformed Image:Kevhu11000.jpg|Kevin 11,000

Ben 10: Alien Force
Kevin reappears in Ben 10: Alien Force as an ally of Ben and Gwen. Kevin's powers operate differently from the way they did in the original series. He has a normal human form, has apparently lost the abilities of Ben's Omnitrix aliens, and his absorbing abilities now allow him to absorb the properties of matter as opposed to draining energy, allowing Kevin to cover himself and others with a layer of any solid substance he is touching (similar to Marvel's Absorbing Man). He has a green sports car which he takes care of obsessively. Through the years, Kevin has gained a considerable amount of knowledge about aliens, possibly through his brokering of alien technology to various aliens and the Forever Knights, this and possibly because he spent a short amount of time in space. He also seems to know a lot about humans with an alien heritage, hinting that his powers may have come from alien ancestry, and that his guess about Gwen's powers being of alien origin was proven correct. As revealed in the episode "The Gauntlet", Kevin, as mentioned by JT, is now reputed as "the toughest kid in town", indicating that he has taken up residence in Bellwood.

In "Darkstar Rising" he reveals that his father was also a Plumber. He never met his father, but his mother told Kevin about what his father did. At the end of the same episode, Kevin, along with Gwen and Ben become 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. In "Darkstar Rising", when explaining that he wanted to be a Plumber for the sake of being just like his father, it served as the main reason that he joined the Tennysons in the first place. He also secretly has a crush on Gwen but too afraid to admit it. There have been several hints throughout the series that Kevin has feelings for Gwen, although he has proven reluctant to admit it. During "What Little Girls are Made Of Gwen" kissed him on the cheek, leaving him dumbfounded on top of the roof; also, he was very much against the idea of Gwen leaving the planet to train with her grandmother, obviously for somewhat selfish reasons, shown by the fact that he seemed to have no legit reasons for her to not go, simply saying that the idea [of leaving with her grandmother] was "lame". in Ben 10 Returns, Gwen is trying to pick up the energy trail of the origin of some alien laser-like devices, and when she says, "I've got it, follow me!" and starts moving forward, Kevin, who is in the driver's seat of his car, whispers, "I'll follow you anywhere." (though immediately states "except there, c'mon Gwen, paint job!" when he was forced to drive through a ditch) He also accidentally confessed that Gwen was his, claiming that the now hideous Mike Morningstar was trying to steal her from him. In "Save The Last Dance", Gwen forces Kevin to take her to her school's dance, forcing a clueless Kevin to seek advice from Ben. Kevin & Gwen however, are force to miss the dance to deal with an out of control Big Chill (which was no longer under Ben's control). After the crisis is over, Julie takes Ben home on her motorcycle, while Gwen & Kevin having missed the dance, Kevin turns on his car radio and they dance to the music.

Kevin's Abilities
Kevin's abilities have somewhat changed through out the course of the series. Generally, his power revolves around absorption. In Ben 10, Kevin can absorb energy and manipulate machinery to a minor extent though the energy he uses is finite, so is required to steal more. By absorbing energy from the Omnitrix, Kevin can temporarily take on attributes of any alien form Ben has currently taken on.

In Framed, it is revealed that Kevin is able to assume any of Ben's alien hero forms at will, due to having absorbed enough sufficient energy from the Omnitrix. Despite this advantage over Ben, he is still defeated. The rage causes his absorption power to spiral out of control, mutating him into a hulking behemoth fusion compromised of the ten starter Omnitrix aliens with no way to revert back to human form. He remains in this form for the remainder of Ben 10.

In Ben 10: Alien Force, Kevin returns in human form with his absorption powers intact. However now, he is able to absorb material into his own being such as metal or rock, transmuting himself a living form of whatever material he has absorbed and use it to increase his physical strength. It is revealed in the episode All That Glitters that the transmutation actually serves as a second skin/coating that eventually peels away as he takes damage. In the episode Plumbers' Helpers, Kevin can absorb multiple materials at once, as demonstrated by absorbing both nickel and bronze (from a penny).

In the episode Ken 10, Kevin regains his human form and appears to possess superhuman powers whilst not transformed, prominent example being the use of XLR8's super speed and Fourarm's brute strength. He can also choose to shift into his fusion form as well. The form has also evolved with him, having been warped into a visage resembling a demon. His right arm is that of Heatblast's that can also turn into tentacles for him to grab others from a distance and can emit supersonic screams.