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Humungousaur 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.

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 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 dark green skin, some horns, sharp teeth, and red eyes. He wore a red fake Ultimatrix symbol on his chest, and there were red lines spread across his body.

Powers and Abilities

  • Enhanced Strength
  • Strong Tail
  • Enhanced Durability
  • Enhanced Jumping
  • Enhanced Reflexes
  • Heat Resistance
  • Quadrupedalism
  • Skilled Melee Combatant
  • Size Alteration (gaining Stegosauride Features)
  • Stegosauride Feature Generation
  • Enhanced Speed
  • Suction Immunity
  • Wind Resistance
  • Loud Roar
  • Strong Teeth
  • Limited Space Survivability
  • Slime Spit (via cold virus)

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]

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.

Humungousaur has the power to increase or decrease his own body size and mass. He can grow bigger up to about 60 feet 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.[1][DM 4]

Humungousaur is durable enough to survive in the vacuum of space for a few minutes[2][3] and pass through dangerous force fields.[4]

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.[5]

Humungousaur can run on all fours in a similar fashion to a bull or a rhinoceros.[6]

Humungousaur is quite agile for his size, as he could somersault onto one of the Forever Knights' battle horses,[7] perform a slide tackle,[8] and evade attacks while jumping.[5]

Humungousaur has powerful jaws that are strong enough to cause pain to a Highbreed.[9]

Humungousaur's immense size and weight make him very useful for moving against strong suction forces[10] and powerful winds.[11]

Humungousaur has a powerful roar, which he once used to scare away a large group of reporters.[12]

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.[13]


  • Strength Limit
  • Trapped by Tyrannopede
  • Heat Resistance Limit
  • Vulnerability to Telekinesis
  • Constrained in Tight Spaces
  • Trapped in Webbing
  • Vulnerability to Electricity
  • Vulnerability to Pyrokinesis
  • Vulnerability to Neuroshock Blasts
  • Underwater Breathing Incapability
  • Vulnerability to Magic
  • Durability Limit
  • Wind Resistance Limit

Humungousaur's strength has a clear limit, as with such cases with moving and lifting beings or objects as heavy as Tyrannopede, whose sheer weight proved a challenge for Humungousaur to manage.[14] Technically speaking, Humungousaur is physically weaker than Tetramands,[DM 1] Highbreeds,[9][15] and Evolved Vaxasaurians, the latter of whom is able to lift a To'kustar in record timing.[16] He was also incapable of harming Ultimate Aggregor with physical blows, despite having given him a vicious beating.[17]

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.[18]

Humungousaur is weak against electricity, such as that generated by an Amperi.[17]

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.[19]

Humungousaur is more of a land-based alien, meaning he cannot breathe underwater.[20]

Humungousaur can be harmed by a Methanosian's fire attacks.[18] Similarly, he can be harmed by a Pyronite's fire attacks even while he has his Stegosauride armor.[3]

Despite his enhanced durability, Humungousaur's feet can be badly hurt by a strong enough blow, similar to those of a human.[21]

Despite his wind resistance, Humungousaur can still be blown off his feet if the wind is strong enough, as shown when he battled Sir George.[22]

Like Four Arms, if Humungousaur is under the effects of a cold virus, his strength and stamina will be severely reduced.[13]


Alien Force

Ultimate Alien



Season 1
Season 2
Season 3
Season 1
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

  • Humungousaur in Vilgax Attacks and Cosmic Destruction
  • In The Rise of Hex

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, Mor' Otesi and Null Void levels of the game.

Nintendo DS Version

Humungousaur and Spidermonkey are reunlocked 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 Umangozaur 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.


  • In Ben 10 Returns: Part 2, All That Glitters, and Inside Man, Humungousaur's voice was electronically edited to sound deeper.
  • Humungousaur is the first alien used on-screen in Ultimate Alien.
  • Humungousaur was the first alien to go ultimate on-screen.[23]
  • In Omniverse, as a running gag in Season 1, Ben tried and failed to turn into Humungousaur on numerous occasions before finally transforming into him in Of Predators and Prey: Part 2, the final episode of the season.
  • Out of all transformations, Humungousaur is the alien used by the most characters other than Ben, having been used by Albedo, Azmuth, Vilgax's Bioids, Plant BenAlpha, and Gwen.
    • Humungousaur is also the most used transformation in the entire Classic Continuity, appearing a total of 89 times.
  • From Arc 4 of Omniverse onwards, Humungousaur is replaced with 16-year-old Blitzwolfer in the opening intro of the show.
  • Despite liking Humungousaur,[AC 1] Dee Bradley Baker dislikes doing the alien's voice because it is hard on his throat.[DM 5][DJW 1][AC 2]
  • The sash Humungousaur wears in Omniverse is similar to that of Monsieur Mallah's from Teen Titans.


Crew Statements

Dwayne McDuffie

Matt Wayne

Derrick J. Wyatt

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
Ultimate Aliens AlbedoArctiguanaBig ChillCannonboltEcho EchoGravattackHumungousaurRathSpidermonkeySwampfireWay BigWildmutt
Fusion Aliens Atomic-XBig ChuckCrashockerDiamond MatterFourmungousaurHeat JawsHumungoopsaurStink ArmsUprigg
Unseen Aliens Decagon VreedleRocksSquidstrictorVentrilosquid
Unseen Fusion Aliens GravadactylXLRG
Future Aliens SandboxShellheadSnakepit
Retconned Eon
Non-Canon Alien ZAntigraviteslaArchfiendzarroBob the BlobCartoon Network AlienDecimus PrimeInvinciblePlantapocalypsePortalerShadowmanStretcheleoThe DarknessThriller Whale

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