34497a3fe0ef52949a1ba8e99894ed69 This article belongs to the Classic Continuity.

Fourmungousaur is the combination of Four Arms' and Humungousaur's DNA. He can only be accessed by using the Biomnitrix.


Fourmungousaur has the body of Humungousaur with the features of Four Arms. His skin is two toned like Humungousaur's, but the darker tan is replaced by Four Arms' red. He has four Humungousaur arms with Four Arms' gloves on the hands. On his arms and head, he has Four Arms' spikes.

He has Humungousaur's white belt with a green stripe, along with Four Arms' pants that go above the belt. His feet are Four Arms' with Humungousaur's toe nails. His head is shaped like Four Arms' with his facial features and Humungousaur's nose.

The Biomnitrix is located on his sash.

Powers and Abilities

He has the combined strength of Humungousaur and Four Arms. He can also jump just as high as Four Arms can.




Ben 10: Omniverse

Naming and Translations

Language Name Origin
Portuguese (Br) Quatronormossauro From "Quatro", which means Four, "Enorme", which means Enormous, and "-sauro", dinosaur sufix.
Spanish (HA) Humungosaurio From Humungousaur.


His name is the combination of Four Arms and Humungousaur.


Fourmungousaur Prototype
  • On the official art, he has Ben 10,000's knee pads, but he doesn't in the actual show. His belt also had its colors reversed.
  • Fourmungousaur and Spitter are the only aliens to have never spoken.
Ben 10,000 Aliens
Omnitrix Aliens
ArctiguanaAtomixBuzzshockCannonboltDiamondheadDittoFour ArmsGrey MatterHeatblastSandboxShellheadSnakepitSnare-ohSpitterStinkflyToepickWay BigWildmuttWildvineXLR8
Biomnitrix Aliens
Atomic-XBig ChuckCrashockerFourmungousaurHumungoopsaurUpRigg

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