Ben 10 Fan Fiction Wiki
Ben 10 Fan Fiction Wiki
You might have been looking for Ben 10: Hidden Universe, the movie in which this location would have first appeared.

The Hidden Universe is the primary DNA holder in the Alien Universe franchise. Primus is used as an external backup, which is referenced when DNA samples are first scanned by an Omnitrix.


In Ben 10: Alien Universe, the dimension was entirely green with platforms. Sentient DNA samples - sometimes multiple of each species - mingled within.

In Back in Action: Alien Universe, the dimension is revamped. It is pitch black most of the time, with motionless transformations suspended in-air. According to Eunice, there is no bottom. It is best suited for flight. When the Omnitrix of the Hidden Universe in question is being used to select a transformation, an Omnitrix symbol opens up in the "sky," with ten spotlights shooting down to outline those in the user's selected playlist. These spotlights may change as playlists are scrolled through. When a transformation is finally selected, it is pulled up and through the Omnitrix symbol, which shuts behind it.


It is located inside the prototype Omnitrix and Assault Omnitrix. It first appeared in Ben 10: Invasion of the Omnitrix when Azmuth brought Ben into the Omnitrix when Darkstar began to steal several of Ben's best transformations. Sentient versions of every alien in the watch co-exist in this world. Every species has duplicates, and every sentient form converse and live as if in real life. When transforming, the Omnitrix takes one of the sentient forms, blanks their mind and DNA to fill it in with the user's, and then lets the users use it. When the user is done with the transformation, it is sent back down with the previously lost mind and DNA intact.

Following the break-in, Azmuth spruced up the pocket dimension. To prevent repeats of the incident, he removed the sentience on most samples and altered the way transformations were activated. This would prevent them from being corruptible - even by control from an Ectonurite. The Hidden Universe features again in Plight of Pinocchio wherein Eunice seeks out the new power source of the Assault Omnitrix - the semi-living Anos sample - with the intent of absorbing its power to gain its mana and become a real living girl.

Notable Inhabitants[]

  • Sentient Anos (power source)
  • Sentient Chromastone
  • Dz'May (Sentient Ghotsfreak)
  • Von (Sentient Amevon)
  • N (Sentient Nanomech)
  • Unitrix Mark III (formerly)
  • Sentient Brainstorm (formerly)
  • Corrupt Humungousaur (formerly)
  • Corrupt Four Arms (formerly)
  • Corrupt Stinkfly (formerly)
  • At least 1,000,000 DNA samples



Ben 10: Alien Universe[]

Back in Action: Alien Universe[]


  • Had it appeared in Ben 10: Hidden Universe first, it would have been an empty world where the sky is always pitch black. Several small grassy platforms exist there, and large grey-floored platforms exist as well.
  • It was broken into by Darkstar thanks to an exploit. This bug/exploit was fixed by Azmuth after Invasion of the Omnitrix.
  • Originally, there were sometimes multiple copies of each species kept locally in the Hidden Universe. For the samples that only had one, corruption - such as in Invasion of the Omnitrix - would disable the sample.
  • Individual Hidden Universes exist inside each active Omnitrix.
  • The Hidden Universe was conceptualized before the debut of Primus in canon. They were later retconned to be intertwined.
  • The events of The Ultimate Sacrifice took place in the Hidden Universe in this franchise.
Created by COLOR
Alien Universe (BTAU - BiA - SiC) - Clad in Darkness - Benjection - DC's Hero of Heroes
Episodes and Shorts of Back in Action: Alien Universe
Season 1 Infernosphere - Limited - Magikfest - No Strings Attached - The Sea's the Limit - Hit and Miss - Dial Z for Zombified - Ten Plus Twenty - Happily Never Happened - Missing Link - New Girl - Revelation - Man in the Stone Mirror - Threat or Menace - The Alternative - Why Am I Here? - Love Stuck - Ultimate Solution - Overcoming Adversaries - Ledger Recon - Welcome to Chronospect - Prelude of the Unleashed - Ben 10: Alien Universe Unleashed
Season 2 Meet the Replacements - Hooking Up With the K's - The Armaggedroid - Fate of the Helpers - Madame Regle - Leaked - Shades of Dawn - Foreverlasting - Can't Trust the Weather, Man - Plight of Pinocchio - Maximum Slumber - Dusk - Escalation - Malevolence - Never Set in Stone
Season 3 Adrift - Marooned - Hall of Mirrors - Benjamin's Island - Skeletons - ...Enjoy Such Liberty - Welcome to Omnitropolis - Time is of the Essence
Shorts Meet the Fans - Operation Pyros - Moira's Presents - Clock Worked - Unity Broker - Why Did the Chicken Cross the Road? - Azmuth's Plumbing - Zennith, Creator of the Omnitrix - The Great Tram Robbery
Unique Aliens in Back in Action: Alien Universe
First used by Super Ben (Assault Omnitrix) Obsorber - Nigester - Plastikitee - Anos - Streak - Bugbite - Muckslide - Autosassin - Ultimate Upchuck - Clinger - Healding - Alkamine - Brawnoceros - Combustiball - Cardstruct - Dreadsense - Frisbit - Koldiak - Plasmodic - Seismix - Wavelength - Warrock - Fetterwing - Suctionrupt
Majestic Forms TBD
First used by Dawn (Alphaline Omnitrix) Vertigo - Starhavoc - Slyt - Blankslate
First used by Future Ben Atomhammer - Ultimate Brainstorm
Characters in Back in Action: Alien Universe
10 Squad Ben Tennyson - Gwen Tennyson - Kevin Levin - Julie Yamamoto - Chelsey Tennyson - Max Tennyson - Cooper Daniels - Ken
Villains Future Ben - Thep Khufan Commander - Scarogus - Dawn - Vilgax - Albedo - Malevolence - Darkstar - Sii - Elena Validus - Dr. Animo - Cyanne - Mistress - Hurricane Vance - Project Inferno - Nightcaster II - Clancy - Metalink
Supporting Characters Professor Paradox - Azmuth - Charmcaster - Eunice - Verdona - Rex - Sir George
Other Timelines/Possible Futures Gwen 20 - Upgrade Ben - Altrazon - Jennifer-Mercedes Tennyson
Groups Second Gynurans (Eli Griswold - Aion) - Omega Squad - Plumbers (Karin Frikton - Io) - Thep Khufan Armada - Board of Galvan
Others Chili - Moira Yourouguaduan