Ben 10: Alien Universe was a short-lived Ben 10 fan-fiction series that ran alongside Ben 10: Alien Force. It first aired December 11, 2008, and was meant to be followed by sequel series Ben 10: Unleashed. It will be succeeded by Ben 10: Omni-Revolution, says ilikestripes400, and have a spin-off telling Hex's side of the story currently under the working title Ben 10: The Story of Hex.
A sequel to the series, completely written, was announced in August 2012, with a premiere of August 29, 2012, titled Back in Action: Alien Universe. It has been stated to be 3 seasons (the first 24 episodes, the last 2 20 episodes each) long.
Ben slaps a brand new Omnitrix on as he battles with colleagues cousin Gwen and friend Kevin to stop a plot to take over the world by squid-like aliens called the DNAliens commanded and created by the dreaded Highbreed.
The show had several villains throughout the story, a few of which appeared as main villains. In the first season (the only completed season), the show introduced a first episode much akin to the first episode of Ben 10: Alien Force, where Ben retrieves the Omnitrix to fight a DNAlien who attacks him during a boxing training session. In the first episode, Ben and Gwen meet Kevin for the first time in 5 years and Ben fights him solely using Swampfire. The gang drive off telling each other's stories of the past few years, when Kevin's car breaks down and the gang are forced to exit the car. Kevin is abducted, and Gwen and Ben as Jetray chase after him only to find him beating up so DNAliens. At this point, Kevin joins the gang as a member.
Throughout the season, Ben, Gwen, Kevin, and at one point, even Grandpa Max, face off with DNAliens, Highbreed, Albedo, and even Hex. In this series, Albedo is at one point reverted to his Galvan form, but later revealed to have been changed back to his Human/Ben self with unlimited access to all alien DNA and their transformations. Albedo is the first villain met in the series, other than the DNAliens who appeared in the first episode, and he faces off with Ben in the second episode. At the end of the battle, Albedo's omnitrix powers out and malfunctions, leading to Ben eventually using Alien X's abilities to revert Albedo to a Galvan, and send him back to his homeworld. In episode 3, a parody of "Gwen 10" is seen where the first episode plays out as if Gwen had gotten the watch first in that episode and Ben remembered the events of the last two episodes. Nonetheless, in the end, a blue mutated Cerebrocrustacean (Brainstorm's species) pinches the Omnitrix, removing it from Gwen's hold and returning it to Ben at last. Later, in episode 4, DNAliens are met again when the gang meet Alan Albright akin to the third episode of Ben 10: Alien Force.
In Episode 5 "Homesick Trilogy: Part 1," Ben is hurt by a Gwen who is revealed to be a DNAlien angered at the fact that his leaders were stopped and his purpose was no longer thanks to the fact that the Highbreed didn't need them anymore for their missions. In episode 6 "Feel My Ghostly Wrath," Ben faces off with Ghostfreak whom he believes is the cause of the loss of Gwen and the return of the DNAliens. There, Ben meets a Plumber who goes crazy and nearly kills Ben. In the last part of the Homesick Trilogy, titled "The Final Part," Ben and Kevin apprehend the most likely DNAlien group to have Gwen, where they find Gwen, and Ben uses Way Big to beat down the Highbreed behind all of it.
In episode 8, Ben goes back in time using Eon and spars with his younger 10-year old self. The two Ben's each use a different set of aliens, including 15-year old Ben utilizing Big Chill to show his younger self what the future entails.  In "Alien Queen," a meant-to-be four-part story, Alien Swarm is parodied. In Episode 10 "Artificial Consequence," the gang meets up with Darkstar for the first time and faces off when Kevin is transformed into a giant hulking monster when he and Darkstar attempt to revert him to his proper human form. In Episode 11, "X-Mas", the long-awaited Christmas special promised as one of the earlier episodes, the Cerebrocrustacean from the earlier 3rd epsiode returns for the last time and is revealed to be none other than Hex in a form he was trapped in by Ghostfreak/Zs'Skayr made to be his slave. The Christmas special featured lines that would later be counteracted by new stories told in the Ben 10: Ultimate Alien two-part special "Absolute Power." In Episode 12 "Darkstar's Inside," Darkstar is seen again ripping aliens out of the watch using Azmuth as a hostage who's known to have the passwords and lockout keys to get inside. In Episode 13, Octagon and Rhomboid Vreedle appear for the first and last time in the series in apprehending Ben as Rath in this "Con of Rath" parody for the Tiffin of Luoda. In Episode 14, the second episode of the second season, Darkstar is seen one last time in "Darkstar Falling," where his villainship is cancelled for the show thanks to Ben. In Episode 15, Clancy returns. In episode 16, the last known episode of the series, "Charmed to Perfection," Charmcaster returns and uses some spells to use Ben's aliens to defeat him. She is stopped by Ben, Gwen, and Kevin.
As Ben Tennyson, average 15-year old is sparring, he is engaged in battle with a form-changing DNAlien. Now that he is unable to find his Grandpa Max, he suits up for battle with the most powerful weapon in the galaxy, the Omnitrix in pursuit of his grandfather and wiping out the DNAliens and their terror.
Ben 10 calls upon his cousin Gwen Tennyson, and recruits Kevin Levin into his team to stop the threats to Earth and the galaxy!
Ben relives the sparring accident where the DNAlien returns, and so in preparing the Omnitrix, he founds out his cousin Gwen got to it first claiming she saw an alien. She uses Jetray in an attempt to battle Kevin Levin, when she is stopped by a mysterious blue Cerebrocrustacean who comes out of nowhere, and pinches the Omnitrix off Gwen and back into Ben's possession.
TRIVIA: This episode was uploaded and aired before the 2nd episode. Also, the episode's name was never truly revealed. This information comes direct from ilikestripes400.
Ben finds a very welcoming DNAlien, and in an attempt to save it using the power of the Omnitrix, reverts the DNAlien to a Pyronite hybrid Plumber's kid named Alan Albright.
TRIVIA: As with the last episode, this episode's name was never truly revealed and this information comes direct from ilikestripes400. Also, this episode was sort of a mid-season finale, and the show remained on hiatus up until the next episode for over 10 months.
This episode follows Zs'Skayr, the Cerebrocrustacean from episode 3, Albedo, who are all figured out by Ben. Zs'Skayr uses a Galvan-Ectonurite machine to infiltrate Albedo's body, and make him into Ben's alternate form with an Omnitrix copy in an attempt to get a hold of Ben. When Ben finds out about this, he isn't too happy, and has to use Alien X to stop the two. Ben learns that there's more to using Alien X than meets the eye, but eventually gets his alternate identities of Alien X, Serena and Bellicus, to work to his liking in returning Albedo to Galvan form.
The Cerebrocrustacean appears several times, and he is shown to be either the sidekick, apprentice, or assistant of Zs'Skayr, as he stands behind Albedo through most of the episode to make sure he doesn't escape.
TRIVIA: Oddly enough, even though Ben already used Alien X and did this easily without having to power through the use of Bellicus and Serena, this episode was the first to introduce them and their reasoning against him. They also seemed to have an Omnitrix safely guarded behind them that if pressed would revert Ben to human. Ben seemed very arrogant in wanting them to do his work in stopping Albedo in this episode.
TRIVIA: The episode is advertised as being called "The Final Part," but its full title is "Homesick Trilogy: The Final Part."
Ben learns that Julie is in trouble, but in an attempt to save her by exiting his room as quickly as possible, he selects the alien Eon. He tries to go back in time and location to where Julie was in trouble, but fails and shoots himself 5 years into the past where he meets an arrogant younger version of himself and does battle near the Rustbucket.
TRIVIA: When the Omnitrix malfunctions and a holographic message is presented to Ben, the Galvan who appears over the watch is not Azmuth. He is revealed by ilikestripes400 to be none other than Albedo, whose holographic message wasn't deleted because Azmuth figured no one would be stupid enough to find the message. The Ben who appears in this episode is still a part of the summer time/canon episodes of the original series, but of what exact period it is unknown.
In this Ben 10: Alien Swarm parody four-part episode, Ben and the gang meet with the nanochips, and an old friend named Elena appears.
Also appearing as a villain, Ghostfreak makes the watch malfunction and Anodite DNA is revealed to be unlocked in the watch.
TRIVIA: Chromastone, Echo Echo, Alien X, Swampfire, Humongousaur, Goop, Brainstorm, Diamondhead, XLR8, Ghostfreak, and Kevin all received facelifts in their apperance. A weird issue, Kevin is shorter than Ben with the new design for him. While the changes to the characters were only meant for this episode, they were seen for the remaining duration of the series.
TRIVIA: For the first time, Ben was controlled by Zs'Skayr. Kevin's car also didn't have a fill in the beginning, and Ship makes his first appearance although for some reason not accompanied by Julie.
TRIVIA: The theme song in this episode was only used in this episode, surprisingly. Oddly enough though, the Echo Echo that appeared in the theme song wasn't the one used in this episode. Instead, a new one that wasn't seen before or again was used. The one from this theme song was used for the first time in the next episode, 110 "Artificial Consequence."
In this parody of "Trade-Off," (37th episode of Alien Force, 11th episode of Alien Force Season 3), Darkstar says he's found a way to revert both him and Kevin back to their normal selves using an ancient device called the Dominus Librium.
When the use of the device goes terribly wrong, Ben finds the power source holding Darkstar's and Kevin's old forms and saves it into the Omnitrix. The next day, Darkstar awakens to find an alternate form of himself, made of molten lava, and Kevin wakes to himself being transformed into the moai like those on Easter Island, the island where he and Darkstar found the Dominus Librium.
TRIVIA: The moai Kevin became had a single eye, and Kevin revealed that he had done a little practice in using mana, as he used the practice to save himself and Darkstar from a hole on Easter Island.
TRIVIA: The contest paired with this episode aired on November 29, 2009, and allowed for anyone who answered with the correct answer to the contest first got to see the episode as of that date.
Hex, now under the alias "X," comes to visit Ben and the gang during their Christmas celebration. X reveals he has been the Cerebrocrustacean, and that Zs'Skayr is his leige.X appears taking the form of Kevin, after absorbing him from standing by him invisible for the duration of the first few seconds of the episode. Now with mana and possibly even Kevin's powers, he's trying to stop Ben and the gang.
TRIVIA: Alien X received yet another (his 2nd) redesign in this episode, this time making him seem a bit leaner by the fact that his arms were now nearly the length of some of the character's bodies.
The second special in a row for the season, this is the season finale. When the Omnitrix malfunctions, Ben enlists Azmuth to fix it, who brings Ben into the Omnitrix. When this happens, Azmuth reveals that he is Darkstar's hostage, and Darkstar is absorbing the aliens from the Omnitrix.
Darkstar gets away with stealing Brainstorm, Humongousaur, Alien X, and Chromastone. He is believed unstoppable until the next season. These aliens don't appear again in the series.
TRIVIA: This was the first and only episode of the series where the episode was uploaded by having recorded it through HyperCam 2.
TRIVIA: This episode aired nearly a month before episode 11, the episode prior to it. This was the second time an episode aired before its predecessor, the first being Episode 3 before 2.
The King of Luoda visits the gang on their way to the beach and sends them on a mission to give their prince, the heir, Tiffin to a pantophage persecutor named Jared.
TRIVIA: The episode parodies "Con of Rath," an Alien Force episode, simply by adding the word "The" at the beginning of the title and through the events of the story. This episode was the first to appear coupled with another full-length episode, and the first not to have a broken up production code with a or b.
TRIVIA: As was with the episode it parodies, Rath appears for the first time in this episode.
January 12, 2010
Darkstar returns and Ben and the gang need to get him out of the way, or he'll keep the DNA of Ben's lost aliens. In this episode, Ben regains Chromastone's, Alien X's, Humongousaur's, and Brainstorm's DNA only to lose them a moment later to Darkstar and a Highbreed commander.
After a final battle with Darkstar, Ben's 4 lost aliens are returned to him peacefully and safely.
TRIVIA: This is Darkstar's last appearance in the series, although had the show gone on, he would have appeared again in Season 3 as the creator had declared in the description of the episode. This episode was coupled with its previous episode.
January 12, 2010
"Clancy Strikes Back!"
Clancy returns and captures Max in trying to get Ben.
TRIVIA: Clancy is revealed to have mutated into an entirely new species which Ben later absorbs into the Omnitrix and uses. The alien is never given a name, and is the first fan-fiction alien to appear in the series.
TRIVIA: This episode brought Max out for the first time, leaving Julie as the only recurring character to not appear in the series.
TRIVIA: This was the last episode of the series to not have been given an official name at the air date.
January 14, 2010
"Charmed to Perfection"
Charmcaster returns and attempts to steal Ben's identity using her spells to appear as some of Ben's star aliens, including Diamondhead.
TRIVIA: Back and forth, throughout the episode it is sometimes impossible to tell who's who in this episode as Charmcaster and Ben keeping transforming and tossing each other against walls and unseen boundaries.
TRIVIA: This is considered the series finale, as after this episode, a month later the sequel series' pilot was aired and Alien Universe was left in the dust.
January 22, 2010
TRIVIA: This episode was revealed on February 17, 2012, and the villain is Vilgax.
TRIVIA: The villain is Zombozo.
TRIVIA: The villain is Psyphon, out for revenge on Ben for killing his Master, Vilgax.
"Respect Your Elders"
The villain is an elderly Enoch, brought from the future to relive the fun of destroying Ben 10.
The episode's title was "In Old Age" up until September 2, 2012.
"Avoid the Void"
TRIVIA: The villain is D'Void/Dr. Animo, and the episode parodies the Ben 10: Alien Force episode "Voided."
"The Knights' Night Out"
TRIVIA: The villains are the Forever Knights, but their plot is unknown.
"Women in Red"
TRIVIA: The villains are Rojo and her gang, but their plot is unknown.
The villain is Darkstar, but his plot is unknown.
This season finale was supposed to be extended.
This episode became the second season finale on September 2, 2012.
In this canon movie, Traxel Shard and Cadden Bolt make an appearance after Traxel, son of Tetrax, appears saying he needs Ben's help in stopping Tetrax's current ailment.
NEW ALIEN: Clinger, a Clanget from Methonasia!
TRIVIA: This was a live-action movie to be counted as 3 episodes, and with the production codes 204-206 (part of season 2). The movie was cancelled/delayed in early 2010 although was originally meant to air on January 31, 2010.
Note: Any episode premiere date that precedes a "+" (plus symbol) represents its re-animated counterpart. If an episode only has a re-animated premiere date, an original version was never animated, an occurrence for many of the season 2 and all of the season 3 episodes.
The original opening for the series featured the low-quality depictions of the aliens. It was used for the first eight episodes of the series and was similar to the Alien Force opening.
In Alien Queen, there was a unique opening featuring a title card from Ben 10: Alien Swarm as well as choreography similar to theAlien Swarm opening. The opening featured higher quality depictions of the aliens.
In episodes following Alien Queen, starting with Artificial Consequence, the opening was styled like the original (which was, in turn, styled like Alien Force's) opening, but featuring the same quality aliens as they had appeared in Alien Queen.
In re-animated, the opening did not appear in the first episode, Ben 10 Returns, but is scheduled to appear in the second episode and so forth. It is, again, styled like the Alien Force opening, but featuring higher-quality aliens as depicted by art director SoRandom31.
In late November of 2009, ilikestripes400 began promoting a live-action that was in production as part of between seasons 1 and 2 of Alien Universe. The live-action was to star Cokedragon and his friends and to be filmed in the following summer. Production of the movie was halted, despite the definitive statement that the movie would premiere January 31, 2010. This never happened, and the movie was eventually canceled.
On February 17, 2012, Stripes had this to say about the movie when asked about it ever being restarted:
No, I do not think it's possible for the movie to be restarted anytime soon. We have the equipment to do a quality recording, but we have lost the script for the movie. Yes, I recently found a good portion of the beginning of [t]he movie, and I do remember a good deal of the events after that, but there's also then the issue of the actors. The actor playing Traxel Shard moved away a while ago.-ilikestripes400
On August 19, 2012, ilikestripes400 announced the return of Ben 10: Alien Universe in the form of a true sqeuel series. The series would return as part of a new series known as Back In Action, titled Back in Action: Alien Universe. 64 episodes are planned, totalling 3 seasons (the first with 24 episodes, and the second and third each sitting at 20 episodes).
The series premiered ten days after the announcement on August 29, 2012.