Kevin Levin/Earth-69

Kevin Ethan "Kevin" Levin, formerly known as Kevin 11, is a nuanced teenage hero who joined Ben Tennyson and his cousin Gwen Tennyson in battling the threats that were the DNAliens and the Highbreed after they caught him trading high-level tech with disguised DNAliens and Highbreed.

Ben 10: Alien Universe

 * All episodes except Ben 10: Invasion of the Omnitrix.

Back in Action: Alien Universe

 * Infernosphere
 * Limited
 * Ben 10 Returns

Trivia

 * The Gwen 10: Alien Force and Ben 10: Alien Queen Kevin's are from alternate timelines.
 * The Gwen 10: Alien Force Kevin being notable, because he has hated Gwen since they were 10 and she got the Omnitrix. Kevin in that timeline would never go on to date Gwen, but instead, Charmcaster.