Hex/Earth-69

Hex, or "X" as he demanded by called by during his last appearance, is a villain that appears in every Ben 10 series. This version of him appeared as a main villain in the first season of Ben 10: Alien Universe, up until the 11th episode titled X-Mas. He was held captive in an altered Cerebrocrustacean (Brainstorm's species) form that was dark blue and much taller.

Backstory
Hex was thought to be either dead or caught by the Plumbers, but instead, a rogue Petrosapien once crossed paths with an unexperienced, baby form of Hex, trapping him underneath a Petrosapien crystal which slowed down his aging process, eventually halting aging at a point where he greatly resembles Kevin with the exception of his face paint and purple robes.

After being found under the Petrosapien crystal by Zs'Skayr, the escaped form of the Codon Stream's DNA sample of an Ecto High Lord, he was mutated into a Cerebrocrustacean. At first, he resembled a normal Cerebrocrustacean, but after he escaped Zs'Skayr when he was told to destroy Ben 10, he created an alternate timeline which he escaped to. Zs'Skayr then locked him in an altered Cerebrocrustacean form that was blue and could not properly harness and use mana or Magic.

He appeared helping Ben in the alternate timeline he created in the episode Gwen 10: Alien Force. He pinched the Omnitrix away from Gwen when she received the omnitrix in this world, returning it to Ben. He appeared again The Homesick Trilogy: The Final Part aiding Zs'Skayr in recruiting Albedo as a team player after reverting him to his Albedo Ben form with a copy of the Omnitrix. Ben then foiled their plot, permanently reverting Albedo to his Galvan form yet again.

He appeared once more in X-Mas as the main villain. Prior to this episode, he escaped his jail as a Cerebrocrustacean and was brought back to his teenager form. At this point, he wanted to be called "X." He fought against Ben and the gang on a not too happy Christmas, cheering up Kevin and bringing him back into the Christmas spirit. He was sent away into the Null Void, and Ben was somehow sent a message through telepathy by someone of how Hex was trapped by Zs'Skayr.

Appearances

 * Gwen 10: Alien Force (first appearance)
 * The Homesick Trilogy: The Final Part
 * X-Mas (last appearance)

Trivia

 * In Gwen 10: Alien Force, he yells "Brainstorm" when he appears out of the Omnitrix. According to Stripes, he did this because at this point he was only supposed to be meant to be an escaped, sentient version of Brainstorm. Instead, he became a new villain who would later be revealed to be Hex/X.
 * Stripes plans to have a short, one-season mini-series about how Hex ended up trapped under the Petrosapien crystal and showing everything up until right after the events of X-Mas. The one season will be 13-20 episodes and start airing sometime in 2013. Production hasn't started yet, and it is in pre-development stages as Stripes has another project to work on at the moment. It is unknown if he'll be animating it.