Ben 10: Ultimate Alien

Ben 10: Ultimate Alien is a sequel series to Ben 10: Alien Force. It premiered on April 23, 2010. The style in this series is different from the Alien Force series. This follows a now 16-year old Ben and Gwen, and 17-year old Kevin. Ben's secret identity has been revealed to the world and he is now an international mega-star super hero, loved by kids all-over the world, but distrusted by many adults. Armed with a mysterious more powerful new Omnitrix, called the Ultimatrix. It went under the working title, Ben 10: Evolution.

A new feature in the series is Ben's new car (as revealed in Ben 10: Alien Swarm), as well as a jet flown by Kevin.

Main characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin

Villains

 * Aggregor
 * Aggregor's soldiers
 * Argit
 * Andreas
 * Ben's Date (Rumored)
 * Buzz
 * Charmcaster
 * Dr. Animo
 * Forever Knights
 * Hammer
 * King Urian
 * Oliver
 * P'andor
 * Ra'ad
 * Rojo
 * Rojo's Gang
 * Sevenseven
 * Ssserpent
 * Surgeon
 * The Stalker
 * Vulkanus
 * Will Harangue
 * Zombozo

Recurring characters

 * Julie Yamamoto
 * Max Tennyson
 * Carl Tennyson
 * Sandra Tennyson

Ultimatrix aliens
(NOTE: As the UItimatrix was synced to the Omnitrix, it has access to all of the aliens Ben previously could transform into)

New aliens

 * Ampfibian
 * Armodrillo
 * NRG
 * Terraspin
 * Water Hazard

Ultimate aliens

 * Ultimate Big Chill
 * Ultimate Cannonbolt
 * Ultimate Echo Echo
 * Ultimate Humongousaur
 * Ultimate Spidermonkey
 * Ultimate Swampfire

Original aliens

 * Big Chill
 * Brainstorm
 * Cannonbolt
 * Chromastone
 * Echo Echo
 * Fourarms
 * Goop
 * Humongousaur
 * Jetray
 * Lodestar
 * Rath
 * Spidermonkey
 * Swampfire
 * Upchuck
 * Way Big
 * Nanomech

Episodes
See: List of Ben 10: Ultimate Alien episodes 

Vehicles

 * Kevin's car
 * DX Mark 10
 * The Mecha-Vehicle
 * Rust Bucket

Opening
The opening shows all the aliens Ben has ever turned into.

Trivia

 * It is the first series for Ben not to start-off with only ten aliens.
 * Dwayne McDuffie has confirmed that Ben will not transform into all of the aliens that appeared in the intro.