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I guess I should thank you. With all that time in the Null Void, I was able to absorb a few tricks from all the aliens you locked in there with me.

– Kevin to Ben 10,000 right before transforming into his mutant form.

Kevin 11,000 is the mutation that 43-year-old Kevin has assumed in his adulthood after absorbing the powers of at least 11,000 aliens imprisoned in Null Void.


Part of Kevin 11,000 resembles Kevin's first major mutation, with legs belonging to Four Arms and secondary arms resembling Wildmutt. However, this mutation is drastically different.

Kevin's head looks like Ghostfreak's skull positioned right-side-up and surrounded by Heatblast's flames.

Kevin's left arm resembles Four Arms but with a hand belonging to Wildmutt and a black tentacle protruding from the elbow. The tentacle has green circuit-like patterns similar to Upgrade, and blue stripes near the tip echoing XLR8's tail. His right arm is a tentacle patterned after Heatblast's body.

Kevin's wings are uneven, as his right wing resembles Stinkfly's while his left wing resembles a Null Guardian's but with a structure resembling Heatblast's body.

Kevin has a set of Null Guardian tentacles protruding from his back under his wings, and wears the same Proto-Tech Armor as Kevin.


Ken 10

In the future, Kevin has been trapped in the Null Void for over a decade. While he was there, Kevin had been absorbing around 11, 000 aliens to acquire their powers. During one of his breakouts, Kevin fathered a son named Devlin. He tricked his own son into believing that he's reformed and that he wanted to "Spend some quality time with his son," and that all he had to do was to find and open the Null Void Projector.

After Devlin tricked Ken Tennyson into showing him where the Null Void Projector was, Devlin opened the projector, releasing Kevin. When Ben found out, Kevin showed his true form. Kevin proved to be more than a match for both Ben, and Ken. When Devlin found out that he was tricked by his own father, Devlin decided to team up with the Tennyson and fight his father. When Ben witness Kevin beating up Ken and knocking him unconscious, he transforms into Way Big and beats up Kevin to, presumably, near death. When Ben and Ken walked away, Kevin got back up, proclaiming that, that was nothing. Eventually, Ken manages to toss a Null Void Bomb right underneath Kevin, trapping Kevin inside the bomb, and presumably sending him back to the Null Void.


A few years later, Kevin has been cured and regained his sanity once again. He is Ben 10,000's friend and Gwendolyn Tennyson's boyfriend again, although Gwendolyn keeps a close eye on him and immediately raises her voice when Kevin starts to speak aggressively. Kevin now works for the Plumbers in the Null Void to keep the likes of the Rooters at bay. He was also able to attend Grandpa Max's Retirement Party and Rook's coronation.

Powers and Abilities

Overall, Kevin 11,000 has access to the abilities of both every alien Ben has ever turned into and the Null Void inmates whose powers he collected.

Being part-Tetramand, Kevin 11,000 shares many of the same powers as Four Arms, such as enhanced strength and jumping.

Being part-Kineceleran, Kevin 11,000 shares many of the same powers as XLR8, such as enhanced speed, agility, and reflexes.

Being part-Petrosapien, Kevin 11,000 shares many of the same powers as Diamondhead, such as firing crystal shard projectiles and morphing his arm into weapons.

Being part-Galvanic Mechamorph, Kevin 11,000 shares many of the same powers as Upgrade, such as elasticity and technopathy.

Being part-Lepidopterran, Kevin 11,000 shares many of the same powers as Stinkfly, such as flight and spitting slime out of his mouth.

Being part-Loboan, Kevin 11,000 shares many of the same powers as Blitzwolfer, such as sonic howls.

Being part-Nosedeenian, Kevin 11,000 shares many of the same powers as Buzzshock, such as electrokinesis.

Being part-Null Guardian, Kevin 11,000 shares many of the same powers as the Null Guardians, such as prehensile tentacles.

Being part-Osmosian, Kevin 11,000 retains his normal form's natural energy absorption powers.

Kevin 11,000 possesses enhanced durability that comes from a multitude of aliens.

Unlike his other mutations from when he was younger, Kevin can shift between his human and mutant forms at will, something he began doing at age 17.[1]


  • Despite his improved durability, Kevin 11,000 is limited to how much damage he can take.


Ben 10

Season 4


  • This mutant form does not have the same setbacks as his first mutant form did due to him having mastered his absorbing powers and having absorbed all of the DNA and energy of the aliens and monsters he absorbed, including their lifeforce.


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