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You've just made a humungous mistake!

– Humungousaur, preparing to fight Rex.[1]

Humungousaur[note 1] is the Omnitrix's DNA sample of a Vaxasaurian from the planet Terradino.


Ben as Humungousaur

Humungousaur is a somewhat humanoid dinosaur standing about twelve feet tall with hard skin that is colored brown on its outer side and beige on its inner side. Both Gwen and Azmuth share these traits as Humungousaur.

In Alien Force and Ultimate Alien, Humungousaur wore the original Omnitrix/Ultimatrix symbol on his chest.

In Video Games, Humungousaur wore a blue motion capture suit.

In Heroes United, the plates on his chest ended in spikes and he had spikes above his eyes.

In Omniverse, Humungousaur wears black briefs with a white waistband, and a green and a black sash across his chest (going from his right shoulder to the left side of his lower back) containing the Omnitrix symbol. Humungousaur now has grey fingernails instead of brown, a slightly bigger chin, green eyes in the same hue of his Omnitrix symbol, a shorter build, and his nose is positioned on his forehead.

Albedo as Negative Humungousaur

In Good Copy, Bad Copy, Negative Humungousaur looked exactly like Ben's Humungousaur. In The Final Battle: Part 1, Negative Humungousaur had red eyes and his Ultimatrix symbol was red as well.

In Omniverse, Negative Humungousaur has a darker skin color, creamy-white inner side and a red Ultimatrix sash across his chest in the opposite direction as Ben's Humungousaur. His eyes are the same red as his sash.

Alpha as Humungousaur

Alpha as Humungousaur had a more monstrous look, with green skin, red eyes, and red lines across his chest. He wore a red Ultimatrix symbol on his chest.

Powers and Abilities

Humungousaur possesses incredible strength, being able to lift and throw objects (heavy or light) up to a high altitude, even into near-earth orbit. Technically speaking, he is physically stronger than Methanosians[DM 1] and Crystalsapiens,[DM 2] but weaker than Tetramands,[DM 1] some Highbreed,[2][3] and Evolved Vaxasaurians, the latter of whom is able to lift a To'kustar in record timing.[4]

Humungousaur possesses a thick, armored hide, which has proven to be durable enough to withstand blaster fire and heavy impacts. His skin is also resistant to heat.[citation needed]

Humungousaur has the power to increase or decrease his own body size and mass. He can grow bigger up to nearly 60 feet[merch 1] at will, increasing his natural strength as he grows. He can also shrink down to about 10 feet.[DM 3]

When Humungousaur grows, his dinosaur features become more pronounced, growing Stegosauride features such as plates on his back, a crest on his forehead, and spikes on his tail. The plates on his shoulders and arms also separate and grow, giving him a more ferocious look. These features give him an extra edge in battle both defensively and offensively. Humungousaur can also generate his Stegosauride features without changing size.[5][DM 4]

Humungousaur is durable enough to survive in the vacuum of space for a few minutes[6][7] and pass through dangerous force fields.[8]

Humungousaur is capable of jumping extremely high despite his size and weight. His tail is also powerful enough to easily knock away Malware's third form.[9]

Humungousaur can run on all fours in a similar fashion to a bull or a rhinoceros.[10]

Humungousaur is quite agile for his size, as he could somersault onto one of the Forever Knights' battle horses,[11] perform a slide tackle,[12] and evade attacks while jumping.[9]

Humungousaur has powerful jaws that are strong enough to cause pain to a Highbreed.[2]

Humungousaur's immense size and weight make him very useful for moving against strong suction forces[13] and powerful winds.[14]

Humungousaur has a powerful roar, which he once used to scare away a large group of reporters.[15]

Similar to Four Arms, Humungousaur is strong enough to create shock waves by clapping his hands together.[MW 1]

Also like Four Arms, when infected with a cold, Humungousaur gains the ability to spit slime.[16]


Humungousaur is very slow and combined with his naturally large physique, it makes him a very easy target for enemy attacks. Even his base size makes it impossible for him to fit into small spaces.

Humungousaur can be discomforted by an Aerophibian's neuroshock blasts.[17]

Humungousaur is weak against electricity, such as that generated by Amperi[18] and Nosedeenians, the latter of which was demonstrated by Suemungousaur.[19]

Being a Vaxasaurian, Humungousaur is vulnerable to being trapped by a Kaosseffexx Ultimasauria, as shown when he was encased in Tyrannopede's cocoon and was unable to escape on his own.[20][21]

Humungousaur is more of a land-based alien, meaning he cannot breathe or swim underwater. Furthermore, due to his immense size and weight he can sink in water.[22]

Despite being resistant to heat, Humungousaur can be harmed by a Methanosian's fire attacks.[17] Similarly, he can be harmed by a Pyronite's fire attacks even while he has his Stegosauride armor.[7]

Like Four Arms, if Humungousaur is under the effects of a cold virus, his strength and stamina will be severely reduced.[16]


Alien Force

Ultimate Alien




Season 1
Season 2
Season 3
Season 2
Season 3
Naljian Destructor
Season 3
Season 3
Season 3

Season 1
Season 2
Season 3
Plant Clone
Season 3
Season 3
Season 3

Video Games

Ben 10: Alien Force

Humungousaur is a playable alien character in all versions of the game.

Nintendo Wii, PlayStation 2, and PlayStation Portable Versions

Humungousaur is initially unavailable, but is unlocked at the beginning of the Rural Rumble level.

Humungousaur is able to use his incredible strength to smash open gates, pick up a tractor and throw it at a wall, remove a massive metallic lid and activate pressure-sensitive platforms by standing on them. Humungousaur is also immune to freezing weaponry.

Humungousaur grows to full size at segments of the A Change in the Weather level to destroy three Highbreed Weather Arrays.

Humungousaur is vital for progression on the Rural Rumble, Running on Autopilot, and A Change in the Weather levels of the game.

Nintendo DS Version

Humungousaur and Swampfire are the only aliens available on Ben's arsenal at the beginning of the game.

Humungousaur is able to break down weak walls.

Humungousaur is vital for progression on the Warehouse 2-3 level of the game.

Ben 10 Alien Force: Vilgax Attacks

Humungousaur is a playable alien character in the game.

Xbox 360, Nintendo Wii, PlayStation 2, and PlayStation Portable Versions

Due to the Omnitrix rebooting after Ben's abuse of the quick-change feature during his battle with an animated Mr. Smoothy mascot, Humungousaur, along with Swampfire, Big Chill, Spidermonkey, and Cannonbolt were the only aliens available on Ben's arsenal upon his arrival on Vulpin.

Humungousaur can use his incredible strength to destroy obstacles, such as vehicles and weak walls, open partially sealed gates, drag large crates to activate pressure-sensitive platforms, and pull levers for various purposes. He can also do a shoulder charge and make shockwaves by slamming the ground.

Earthquake is an unlockable combo move for Humungousaur.

Humungousaur is vital for progression on the Bellwood, Terradino, Encephalonus IV, Anur Phaetos, MorOtesi, and Null Void levels of the game.

Nintendo DS Version

Humungousaur and Spidermonkey are unlocked upon Ben's arrival on Terradino.

Humungousaur is able to destroy temple columns, pillars, and other rock formations.

Humungousaur is vital for progression on the Terradino, Encephalonus IV, and Null Void levels of the game.

Ben 10 Alien Force: The Rise of Hex

Humungousaur is a playable alien character in the game.

Due to the Omnitrix sorting out after Ben fiddled with it, Humungousaur was temporarily locked until the beginning of Level 3.

Humungousaur is able to use his incredible strength to carry crates or boulders in order to activate pressure-sensitive platforms, as well as break down weaker walls. While doing so, Humungousaur increases his size and gains his signature bone plates and spikes.

Humungousaur's large size prevents him from accessing small areas.

Ben 10 Ultimate Alien: Cosmic Destruction

Humungousaur is a playable alien character in the game.

Humungousaur is vital for progression on The Catacombs, Devil's Tower, and The Final Battle levels of the game.

Naming and Translations

Language Name Origin
Arabic هومنجاسور Transliteration: houmungasaur, mispronunciation of the original name
Bulgarian Човекозавър/Čovekozavŭr From човек, human and -завър/-zavŭr, -saur
Chinese 神力暴龙 From 神力 (Shén Lì), powerful and 暴龙 (Bào Lóng), T-Rex
Croatian Ljudosaur/Људосаур From Ljudo/Људо, people or human, and -saur, a suffix for dinosaur
Dutch Gigantosaurus From gigantous and dinosaur
French Énormosaure From énorme, enormous and -saure, -saur
German Gigantosaurus From gigantisch, gigantous and dinosaur
Greek Τεραστιόσαυρος From τεράστιος, huge and δεινόσαυρος, dinosaur
Hebrew יומוזאור From human and dinosaur
Hungarian Óriásszaurusz From óriás, giant and -szaurusz, -saur
Indonesian Humonggosaurus From the original name
Italian Omosauro From homo, human being in Latin, and sauros, lizard in Latin
Korean 자이언트사우루스 From 자이언트(giant), and 사우루스(saurous)
Norwegian Enormosaur From enormous and dinosaur
Polish Gigantozaur From gigant, giant and dinosaur
Portuguese (Br) Enormossauro From enorme, enormous and dinossauro, dinosaur
Romanian Umangozaurul From uman, human, and -zaur, a suffix for dinosaur
Russian Гумангозавр From Humungousaur translated to Russian
Serbian Ljudosaur/Људосаур From Ljudo/Људо, people or human, and -saur, a suffix for dinosaur
Spanish (HA) Humungosaurio Humungousaur translated to Spanish; pronounced /ʊmʊngoʊ'saʊɾio/ (All That Glitters), /ʊmʊngo'sauɾio/ (normally) and /ʊnmʊngo'sauɾio/ (rarely)
Spanish (Spain) Gigantosaurio From gigantous and dinosaur
Swedish Gigantosaur From gigant, gigantic and dinosaur
Tagalog Yumongusor The Tagalog version of Humongusaur
Turkish İnsanazor From insan, human and dinozor, dinosaur


Humungousaur's name is a portmanteau of "humongous," meaning "big," referencing his size, and "dinosaur," referencing his appearance.


  • Humungousaur's voice has changed over the course of his appearances in the Classic Continuity:
  • Humungousaur is the last alien used by Ben with the original Omnitrix.
  • Humungousaur is the first alien used on-screen in Ultimate Alien, as well as the first alien to go ultimate on-screen.[23]
  • As a running gag in Omniverse's Arc 1, Ben had many unsuccessful attempts in transforming into Humungousaur until Of Predators and Prey: Part 2.
  • Out of all transformations, Humungousaur is the alien used by most characters other than Ben, having been used by Albedo, Azmuth, Vilgax's Bioids, Plant Ben, Alpha, and Gwen.
    • Humungousaur is also the most used transformation in the entire Classic Timeline, appearing a total of 89 times.
  • Humungousaur never used his size alteration powers in Omniverse because no one from the crew ever brought it up.[DJW 2]
  • From Arc 4 of Omniverse onwards, Humungousaur is replaced with 16-year-old Blitzwolfer in the opening intro of the show.
  • Humungousaur is Ryan Kelley's favorite alien.[AC 1]
  • While Dee Bradley Baker likes Humungousaur,[AC 2] he does not like doing the alien's voice because it is hard on his throat.[DM 5][DJW 3][AC 3]
  • During the pre-production stage of Alien Force, Humungousaur had concept art drawn by Eric Canete.[EC 1]
  • Humungousaur was originally supposed to appear a second time in It's Not Easy Being Gwen to defeat Animo.[JHK 1] His role was taken by Ultimate Cannonbolt in the final version of the episode.
  • The sash Humungousaur wears in Omniverse is similar to that of Monsieur Mallah's from Teen Titans.


  1. Humungousaur was originally intended to be spelled as "Humungosaur" (which is how his name is pronounced on the show). The officially used name was a typo that stuck and became canon.[DJW 1]


Crew Statements

Dwayne McDuffie

Matt Wayne

Derrick J. Wyatt

Eric Canete

Jae Hong Kim


Audio Commentary

See Also

Introduced in Ben 10 ArctiguanaBlitzwolferBuzzshockCannonboltDiamondheadDittoEye GuyFour ArmsFrankenstrikeGhostfreakGrey MatterHeatblastRipjawsSnare-ohSpitterStinkflyUpchuckUpgradeWay BigWildmuttWildvineXLR8
Introduced in Alien Force Alien XBig ChillBrainstormChromastoneEcho EchoGoopHumungousaurJetrayLodestarNanomechRathSpidermonkeySwampfire
Introduced in Ultimate Alien AmpfibianArmodrilloChamalienClockworkEatleFasttrackJuryriggNRGShocksquatchTerraspinWater Hazard
Introduced in Omniverse AstrodactylAtomixBall WeevilBloxxBullfragCrashhopperFeedbackGravattackGutrotKickin HawkMole-StachePesky DustThe WorstToepickWalkatroutWhampire
Future Aliens SandboxShellheadSnakepit
Ultimate Aliens AlbedoArctiguanaBenBig ChillCannonboltEcho EchoGravattackHumungousaurRathSpidermonkeySwampfireWay BigWildmutt
Fusion Aliens Atomic-XBig ChuckCrashockerDiamond MatterFourmungousaurHeat JawsHumungoopsaurStink ArmsUprigg
Concept Fusion Aliens GravadactylXLRG
Other Aliens in Official Media 10/10/10 Box AliensAntigraviteslaBob the BlobCartoon Network AlienEon (Retconned)MoyoInvinciblePlantapocalypsePortalerRocksShadowmanSquidstrictorStretcheleo