Ben 10: Ultimate Alien: Season 3 (Series Finale)

After the defeat of Diagon and Robot Gwen, Kevin was banned from the Plumbers. And Axel became a student at United States of America Air Force as an air force lieutenant. And Ben tells Azmuth he'll need more time on the Ultimatrix after saying it's not that he's ready yet, though Azmuth said he would make a wise hero. And the Real Gwen is free and is now wearing blue and getting a haircut. This is a season where Ben, Gwen, Axel and Elena will make a combat against Lord Ricoronis, the son of the Real Vilgax.

Characters

 * Ben Tennyson (Yuri Lowenthal)
 * Gwen Tennyson (Tara Strong)
 * Air Force Lieutenant Axel (Bumper Robinson)
 * Elena Validus (Tia Texada)
 * Grandpa Max (Paul Eiding)
 * Julie Yamamoto (Vvyan Pham)

Secondary Characters

 * Professor Eugene Paradox (David McCallum)
 * Azmuth (Jeff Bennett)
 * Cooper Daniels (Chris Pratt)
 * Eunice Daniels (Molly Quinn)
 * Jimmy Jones (Scott Menville) - Ben's pal after he received a signal watch to call Ben for an emergency
 * Pierce Wheels (Adam Wylie) - Now a group with Rex's friends:
 * Skwydd (Jason Marsden)
 * Tuck (Dante Basco)
 * Cricket (Vvyan Pham)
 * Circe (Tara Sands)
 * Rex Salazar (Daryl Sabara)
 * Dr. Rebecca Holiday (Grey DeLisle)
 * Bobo Haha (John DiMaggio)
 * Agent Six (Wally Kurth)
 * Noah Nixon (Fred Savage)
 * White Knight (J.K. Simmons)
 * Argit (Alexander Polinsky)

Villains

 * Lord Ricoronis (James Remar) - The Main Antagonist of Season 3
 * Psyphon (Dee Bradley Baker)
 * Sevenseven (Dee Bradley Baker)
 * The Pack:
 * Van Kleiss (Troy Baker) - Leader
 * Biowulf (Troy Baker)
 * Skalamander (John DiMaggio)
 * Kevin Levin (Greg Cipes) - back to his old ways after his revelations
 * Ragnarok (John DiMaggio)
 * Albedo (Yuri Lowenthal)
 * Evil Way Big (Yuri Lowenthal)

Aliens

 * Heatblast (Steven Blum)
 * Wildmutt (Frank Welker)
 * Diamondhead (Jim Ward)
 * XLR8 (Jim Ward)
 * Grey Matter (???)
 * Fourarms (Richard McGonagle)
 * Stinkfly (Dee Bradley Baker)
 * Ripjaws (Fred Tatasciore)
 * Upgrade (Yuri Lowenthal)
 * Ghostfreak (Steven Blum)
 * Cannonbolt (Fred Tatasciore)
 * Wildvine (Jim Ward)
 * Benwolf (Troy Baker)
 * Benmummy (Richard Green)
 * Benvicktor (Michael Dorn)
 * Upchuck (???)
 * Ditto (Rob Paulsen)
 * Way Big (Fred Tatasciore)
 * Eye Guy (Dee Bradley Baker)
 * Buzzshock (???)
 * Swampfire (???)
 * Echo Echo (???)
 * Humungousaur (Kevin Michael Richardson)
 * Jetray (???)
 * Big Chill (???)
 * Chromastone (???)
 * Brainstorm (???)
 * Spidermonkey (???)
 * Goop (???)
 * Alien X (Yuri Lowenthal)
 * Lodestar (???)
 * Rath (John DiMaggio)
 * Nanomech (???)
 * Water Hazard (???)
 * Terraspin (???)
 * NRG (???)
 * Armodrillo (???)
 * Ampfibian (???)
 * Fasttrack (???)
 * ChamAlien (???)
 * Eatle (???)
 * Clockwork (Patrick Warbutton)
 * Jury Rigg (???)
 * Sonic Rex (???)
 * Goony (???)
 * Blacklash (???)
 * Spitter (???)
 * Arcticguana (???)
 * Shocksquatch (???)
 * Ultimate Swampfire (???)
 * Ultimate Echo Echo (???)
 * Ultimate Humungousaur (Kevin Michael Richardson)
 * Ultimate Big Chill (???)
 * Ultimate Spidermonkey (???)
 * Ultimate Cannonbolt (Fred Tatasciore)
 * Ultimate Wildmutt (Frank Welker)
 * Ultimate Way Big (Fred Tatasciore)
 * Ultimate Humungousaur (Kevin Michael Richardson)
 * Ultimate Big Chill (???)
 * Ultimate Spidermonkey (???)
 * Ultimate Cannonbolt (Fred Tatasciore)
 * Ultimate Wildmutt (Frank Welker)
 * Ultimate Way Big (Fred Tatasciore)