Power, weakness. Imagine a Power so great that once exerted it would leave you completely weak. Alien X is coming.

Alien X is the Omnitrix's DNA sample of a Celestialsapien from the Forge of Creation, Alien X first appear in Ben 10: Alien Force in the episode called X = Ben + 2. 


Alien X is a completely black humanoid alien with white star-like spots all over his body, He has white hands with four fingers and a thumb on ease one, three horns on his head. He has green eyes and has the Omnitrix symbol on his chest.

In Omniverse, Alien X looks almost the same, but with a few minor changes. His body is more muscular than before, His chin is bigger while his horns are smaller and the spots on his body are now brighter. His Omnitrix symbol remain on his chest.

Powers and Abilities

  • ​Nigh-Omnipotence: Alien X is a nigh-omnipotent, According to Serena, Alien X's species are the most powerful beings in the Universe with a few weaknesses.
    • ​Reality Warping: Alien X can warp reality, time, and space. According to Derrick J. Wyatt, Alien X and other Celestialsapiens can even destroy the whole multiverse which contains infinite realities - universes, infinite dimensions, and infinite timelines with only a few thoughts.[1]
    • Universal Recreation: Alien X is powerful enough to re-create a new universe.
    • Absolute Strength: Alien X possesses strength that can destroy planets in single punches.
    • Immortality: It's suggested that Alien X is immune to aging or just possesses longevity.
    • Nigh Invulnerability: Alien X is very durable, as he was immune to the Anihilaarg, which was capable of destroying a universe.
    • Flight: Alien X is capable of flying at high speeds.
    • Self-Duplication: Alien X can produce copies of himself.
    • Galaxy Generation: Alien X can create galaxies that can suck beings into them.
    • Telekinesis: Alien X can telekinetically manipulate and control objects.
    • Deflection: Alien X is able to deflect any attacks such as Swift's neuroshock blasts.
    • Hand-to-Hand Combatant: Alien X has demonstrated great ability in melee combat as demonstrated when the later was fighting the Galactic Gladiator. When fighting, Alien X was able to trade blows with the Celestialsapien warrior and fight on equal ground during the match.


Despite his great power, Alien X has weaknesses. The biggest weakness is the two personalities of Alien X; Bellicus, the voice of rage and aggression and Serena, the voice of love and compassion. The reason is because for Alien X to perform any action the two personalities must both agree to what would be the best action but because they are two different personalities it is difficult for them to agree on one thing and also to focus on one thing. This makes Alien X completely immobile and vulnerable until a decision has been made (although this weakness has been removed in Ben 10: Omniverse since the episode called Universe vs. Tennyson and later shown in the episode Weapon Xi: Part 1). According to Ben, Alien X is also vulnerable to having his power stolen such as when Ben refused to transform into Alien X when due to Michael Morningstar (Darkstar) draining his energy. When Ben managed to utilize Alien X's power by having the two personalities argue in peace, the only weakness he had was a lack of imagination. Another weakness is where he can also be vulnerable when fighting with other Celestialsapiens, this is shown when the Galactic Gladiator was able to harm Alien X with ease. and according to Derrick J.Wyatt, Alien X is unable to survive on planet Anur Vladias.


  • Alien X is the most powerful out of all Ben's aliens
  • Alien X has appeared in 6 episodes (Not counting The Ultimate Enemy: Part 2, Since he was only seen in a flashback from X = Ben + 2).
  • Alien X is one of the few aliens that Ben doesn't use more often, do to risk being stuck debating forever with Serena and Bellicus and its great power.