|Home World||Forge of Creation|
|Powers and Abilities|
|Voice Actor|| Yuri Lowenthal (Ben)|
Kevin Conroy (Bellicus in AF)
Jeff Bennet (Bellicus in UA)
Eric Bauza (Bellicus in OV)
Vicki Lewis (Serena in AF)
Tara Strong (Serena in UA)
Kimberly Brooks (Serena in OV)
|First Appearance||X = Ben + 2|
In Ben 10: Protector of the Omniverse, he has his Alien Force/Ultimate Alien appearance, but with longer horns.
In Ben 10: Heroics Unleashed, he has his Omniverse appearance, but without a protruding chin.
In Ben 10: Ultimate Omniverse, he has his Alien Force/Ultimate Alien appearance, but with green cuffs on his wrists, as well as bigger stars.
In Ben 10: The Omniwars, he has his Alien Force/Ultimate Alien appearance, but with more stars on his body, also smaller in size.
In Ben 10: Unbound , he has his Alien Force/Ultimate Alien appearance but he has more stars and is taller.
BackstoryBen is afraid that Alien X might be too powerful, and only uses him in dire situations. Alien X is capable of warping reality at will. He has a black body covered with tiny white stars, white hands and feet, green eyes, and three horns protruding from his head. Alien X possesses three distinct personalities: Serena, the voice of love and compassion, Bellicus, the voice of rage and aggression, and Ben, the voice of reason.
Alien X can do virtually anything, as long as his personalities can agree on an action.
In order for Alien X to perform any action, including but not limited to, simple movement and transforming back into Ben, at least two of the three personalities (Serena, Bellicus, or Ben) must agree to do so. This reveals to be a major weakness, as the personalities initially weren't even interested in dealing with present affairs and wanted to finish some past ones that weren't possible to deal with without Ben (with a comical scene where Bellicus reopens a discussion on whether or not to save the dinosaurs from extinction).
He is one of Terry's orginal 12. And is only used in dire emergencies. His name is also changed to Alien XII.
Ben 10: Unbound
Alien Z is Ultimate Alien X. He has the same overall appearance. But in Alien Z's case, he has a white body studded with little black stars. He also has the same reality warping powers as Alien X, but he is not held back by Serena or Bellicus.
Alien X will be used sporadically in the series, unlike the franchise's tradition of Alien X being used once in each series.
Ben 10: Superverse
He will appear later in Ben 10: Superverse and will only be used once.
As opposed to his sparing canon appearances, Alien X appeared five times, once being without the need for Bellicus and Serena. He was one of four aliens stolen by Darkstar in Ben 10: Invasion of the Omnitrix, and retrieved in Darkstar Falling.
- Albedo Returns
- Homesick Trilogy: The Final Part (first apperance of Bellicus and Serena)
- Ben 10: Alien Queen (non-fanon)
- Ben 10: Invasion of the Omnitrix (stolen)
Ben 10: Alien Generation
He is set to appear in Season 2
16yr old Alien X looks the same but has total control over himself he has his AF/UA look
11yr old Alien X looks the same but he needs two other personalitys he has his AF/UA look as well
Ben 10: Aliens
he is confirmed to appear once every season
Alien X is unlocked when the Omnitrix resets after defeating the Highbreed. He is usually used only as a last resort, but is not always successfully used.
- War of the Worlds Part 2 (John Smith 10) (hologram)
- Tough Luck (John Smith 10) (first appearance)
- Fame (John Smith 10) (on TV)
- Catch a Falling Star (John Smith 10)
- The Ultimate Enemy Part 3 (John Smith 10)
By Rob Lucci
By Metal John
By Ultimate John
- Be Afraid of the Dark (John Smith 10) (flashback)
- Round Four Part 2 (accidental transformation; selected alien was Way Big)
- The Final Battle Part 2 (John Smith 10) (first re-appearance) (accidental transformation; selected alien was Upgrade)
By Past John
- His World Part 2 (first re-appearance) (by Past John)
By John in Ahmad's body
Alien X first appears in the wild, being used by a bartender for a get-rich-quick-sceme, offering a prize to the one who can kill it.
Ben 10: Alien Force
- X = Ben + 2
Ben 10: Ultimate Alien
- The Forge of Creation
Ben 10: Omniverse
- So Long, And Thanks For All The Smoothies
Ben 10: Protector of the Omniverse
- Azmuth's Invention (first reappearance)
Ben 10: Heroics Unleashed
Ben 10: Ultimate Omniverse
Kyzan uses Alien X to destroy Apocalymon in Convergence: Battle for Reality
Ben 10: Dimensional Warriors
Along with the other aliens, Alien X has taken on a darker tone.
- The Battle For Earth Part 2 (First Appearance)
Ben 10,000 RisesIn Ben 10,000 Rises, Alien X has a turtleneck. He appears in Plan X where Ben gets stuck as him.
Richard's A Christmas Carol
In Richard's A Christmas Carol, Alien X portrays the second form of the Ghost of Christmas Yet to Come. He changes from the first form when showing Scrooge the Kratchit family's future. He shows Scrooge the grave of himself.