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Slapback is one of Ben Tennyson's alien egos from Ben 10 Reboot.

He is voiced by Todd Haberkorn who is best known voicing as Death the Kid, Kimihiro Watanuki, Keroro, Ling Yao, Shikadai Nara, Natsu Dragneel, Firo Prochainezo, Teruteru Hanamura, Puppetmon, Digimon Emperor, Nobuyuki Sugou and Saiken.


Slapback is the DNA sample of an Ekoleptoid from Ekoplecton, a frog-like creature with metallic grey eyebrows.

Powers and Abilities

His main power is kinetic duplication, where if he takes a hit to his back, he splits into two copies of himself, and while each copy only has half the height of the original, they are twice as dense as the original.


Ben gets frustrated when the Omnitrix reboot for 5 days. But, when it got done, Ben got 3 New Aliens; Slapback, Rath & Humungousaur (Which replaced Grey Matter, Overflow and Wildvine which are now off the playlist with Upgrade).

He first appear in Omni-Copped.


  • His voice becomes higher pitched the more he duplicates.
  • He share same voice with Grey Matter.



          Ben 10 logo Heroes

Main Heroes
Ben Tennyson | Gwen Tennyson | Max Tennyson | Kevin Levin | Rook Blonko

Azmuth | Professor Paradox | Cooper Daniels

Original Series Aliens
Heatblast | Four Arms | Diamondhead | Ripjaws | Upgrade | Ghostfreak | Stinkfly | Grey Matter | Wildmutt | Cannonbolt | Wildvine | Upchuck | Ditto | Blitzwolfer | Snare-oh | Frankenstrike | Eye Guy | Way Big

Alien Forces/Ultimate Alien Series Aliens
Swampfire | Chromastone | Humungousaur | Spidermonkey | Echo Echo | Big Chill | Brainstorm | Jetray | Alien X | Lodestar | Clockwork | Rath

Omniverse Aliens
Feedback | Gravattack | Kickin Hawk | Atomix | Astrodactyl | Bullfrag | Crashhopper | Pesky Dust | Freezelizard | Shockquatch | Buzzshock | Whampire

Reboot Series
Ben Tennyson | Gwen Tennyson | Max Tennyson

Reboot Series Aliens
Heatblast | Diamondhead | Four Arms | Grey Matter | XLR8 | Wildvine | Cannonbolt | Upgrade | Stinkfly | Rath | Humungousaur | Overflow | Gax | Shock Rock | Slapback | Glitch | Jetray


Ultimate Forms
Ultimate Echo Echo | Ultimate Humungousaur | Ultimate Swampfire | Ultimate Beast | Ultimate Big Chill | Ultimate Way Big |

Fusion Aliens
Atomic X | XlrArmBlastDiamond

Other Omnitrix Users
Ben 23 | No Watch Ben | Gwen 10

Other Characters
Spellbinder | Tetrax Shard | Sir George | Lucy Mann | Julie Yamamoto | Kai Green | Jimmy Jones | Ken Tennyson | Clyde Fife | Fistina | Reinrassic III | Kwarrel | Skurd | Devlin Levin | Zed | Baz-El | Ship

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