Ben 10 Ultimate Alien: Alien Kombat

 Plot

Ben is invited to a fighting competition for celebration of defeating the most powerful villains in the galaxy. (Like Vilgax and Aggregor.) He takes part of the competiton and ends up bringing Kevin along to enter too. But, Vulkanus and Sixsix are in the competiton too. Ben and Kevin learns they want to steal the trophy and destory the planet with the greatest fighters and heroes on it. Can they be stop in time.

This a 1hour Episode, Ben and Kevin are one of the main charactors in special.

Heroes
Minor charactors
 * Ben Tennyson
 * Kevin Levin
 * Tetrax Shard (voiced by Dave Fennoy): A Petrasapien Omnitrix/Ultimatrix Guardian and a friend of Ben, he is part of the competition, too and represent his race of Petropia.
 * Ziro Gree (voiced by Dante Basco): A alien hybrid Polar Manzardill that represent for his people of X'Nelli. He is cool and easy going, he becomes good friends with Ben and grudge against Flarez. He ressembles humanoid version of Articgunna and mention his father is a Polar Manzardill and his mother is human. He wears a blue headband, fingerless gloves, baggy pants and shirt, yellow eyes and "spikey hair."
 * Kling (voiced by Kevin Michael Richardson): A Transylian that look like Dr.Vicktor and has green eyes and three scars on his chest.
 * Master Magma (voiced by Steve Blum): Master fighter Pyronite and Flarez's father. One of the judges for the competition and tries to teach his son about honor.
 * Hype Zone (voiced by Tom Kenny): A famous celebertiy Citrakayah and same race as Fastrack. He was Kevin's last opponent and interupted by Vulkanus. Kevin mention him as a showoff and but can make entrance, as he does a backflip in areana.
 * Lepidopterran Fighter: Defeated by Ben.
 * Tetramand Fighter: Defeated by Ben.
 * Arachnachimp Fighter: Defeated by Kevin.
 * Isis Talon: A female Appoolexian and Ziro's girlfriend that came watch his matches. She ressembles Intress from Chaotic: Dawn of Perim. like Rath, she get very mad at anyone that hurt Ziro and which Vulkanus experinces for trying to destorying the planet and knocking out Ziro from her wrath.
 * Azmuth (voiced by Jeff Bennent): Creator of the Omnitrix and one of the Judges for competiton.

Villains

 * Vulkanus
 * Sixsix
 * Reaptile (voiced by Frank Welker): A mutant Merlinisapien wearing a ninja suit and red eyes, he is Ben first opponent in the competition and later work with Sixsix to steal trophy and destory the planet.
 * Flarez Magma (voiced by Tom Kenny): A young dishonor Pyronite that do what it takes to win. He is like the high school bully and picks on Ziro, for being half human.
 * Midite: A half Econurite and human, a pale goth girl with black hair and purple eyes. She has the same powers as Ghostfreak and was Ben second opponent to face off. At the end, she wanted to joined the Plumbers and her eyes turn pink, leaving with Ben and Kevin.

Aliens Used

 * Wildmutt (2x)
 * Shellhead (debut)
 * Alien X (mention and still set back on locked mode)
 * Eyeguy (first reappearance since Original series)
 * Spitter (first reappearance since Original series)
 * Rath 
 * Fasttrack
 * Humongousaur
 * Ditto (first reappearance since Original series)
 * Benmummy (accidental transformation; selected alien was Goop)
 * Benwolf (first reappearance since Original series)
 * Eatle (second appearance in Ultimate Alien)
 * Clockwork (first time selected by 16 year old Ben)
 * Waybig

Trivia
 * This episode is based on Mortal Kombat and even the fighters.
 * Ziro Gree is based Liu Kang and with Sub Zero fight moves and powers, Hype Zone is based Johnny Cage, Kling is based on Jax, Reaptile is based on Reptile and Flarez Magma is based on Scorpion. 
 * Only five aliens from the Orignal Series return and used this episode.
 * Steve Jay Blum returns as Master Magma, a Pyronite (in the original series, he play Heatblast, Ghostfreak and Vilgax.)
 * Sixsix returns from the Original series and help Vulkanus again.