Brawnoceros is a hulking rhinoceros-like humanoid alien of unknown origin that features in Back in Action: Alien Universe.


Brawnoceros draws design cues from a number of different real rhino species, primarily his bluish slate grey color coming from both black and white rhinos. He also has a beak-like mouth akin to Sumatran rhinos, rather than mammalian lips. Otherwise, he is a wide-framed humanoid, with natural shields that protect his shoulders, elbows, and knees. His eyes, ears, and nose are spaced apart his wide and long head like rhinos, and his horn is dead center. His feet are three "toes" planted in a T shape, and his hands have three humanoid fingers (a thumb, an index and ring finger) with nails broken right along the center. For reasons unknown, he possesses a partial mane in the user's hair color that runs from just the back of the head to the horn.

His Assault Omnitrix symbol is located on his upper right shoulder.


Like Rath, his species' IQ has a much lower ceiling, which will harm most users' capacity for reason. Unlike Rath, he's a friendly idiot.

Powers and Abilities

Brawnoceros' primary ability is his projectile horn. Poachers beware, because he can both fire it straight ahead and control it once it's airborne. Like a boomerang, it can be pulled right back onto his head. If destroyed (or decayed from prolonged separation), it can slowly regenerate.

Additionally, Brawnoceros has strong natural shields on his shoulders, elbows, and knees. These points are very durable, though the rest of his body is more squishy and fragile. Overall, however, he is somewhat resilient.


His naturally lower IQ can be a detriment to the user and those around them.

Though his horn can be regenerated from loss, destruction of the horn is an excruciating experience to the point that the user could pass out.


Back in Action: Alien Universe


His name is a portmanteau of Brawn + rhinoceros.


  • Brawnoceros has appeared in all but one episode (The Armaggedroid) since his debut.
Back in Action: Alien Universe --COLOR (TCF)
Episode Guide
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
Canon Aliens
Original Series
Heatblast - Wildmutt - Diamondhead - XLR8 - Four Arms - Stinkfly - Ghostfreak - Ripjaws - Upgrade - Grey Matter - Cannonbolt - Wildvine - Benwolf - Benmummy - Benvicktor - Way Big - Upchuck - Eye Guy - Ditto - Buzzshock - Spitter - Articguana
Alien Force
Swampfire - Echo Echo - Humungousaur - Jetray - Big Chill - Chromastone - Brainstorm - Spidermonkey - Goop - Alien X - Rath - Lodestar
Ultimate Alien
Water Hazard - Terraspin - NRG - Forge (Armodrillo) - AmpFibian - Clockwork - Fasttrack - Jury Rigg - ChamAlien - Eatle - Shocksquatch
Omniverse (regrettably)
Feedback - Bloxx - Gravattack - Crashhopper - Ball Weevil - Walkatrout - Pesky Dust - Molestache - The Worst - Kickin Hawk - Toepick - Astrodactyl - Bullfrag - Radius - Gutrot - Whampire
Ultimate Forms
Swampfire - Spidermonkey - Big Chill - Humungousaur - Cannonbolt - Echo Echo - Wildmutt - Way Big - Grey Matter - Articguana - Gravattack - Jetray - Benmummy - Upchuck
Unique Aliens
Season 1 Additionals
Obsorber - Nigester - Plastikitee - Anos - Streak - Bugbite - Muckslide - Autosassin - Boomchomp - Abstallion
Season 2 Originals
Alkamine - Brawnoceros - Combustiball - Cardstruct - Dreadsense - Frisbit - Plasmodic - Seismix - Wavelength
Season 2 Additionals
Atomhammer - Hindsight - Starhavoc
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