|Species|| ½ Tetramand|
|Powers and Abilities|
|Abilities|| Enhanced Strength|
|First Appearance||And Then There Were None|
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
- Fourmungousaur first appeared in And Then There Were None. Fourmungousaur battled Mad Rath and Benzarro as Snare-oh.
- In And Then There Was Ben, Fourmungousaur defeated Eon.
Ben 10: Omniverse
- 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.
|Ben 10,000 Aliens|
|Arctiguana • Buzzshock • Cannonbolt • Diamondhead • Ditto • Four Arms • Grey Matter • Heatblast • Sandbox • Shellhead • Snakepit • Snare-oh • Spitter • Stinkfly • Way Big • Wildmutt • Wildvine • XLR8|
|Atomic-X • Big Chuck • Crashocker • Fourmungousaur • Humungoopsaur • UpRigg|