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Grey Matter is the Omnitrix's DNA sample of a Galvan from the planet Galvan Prime.


Grey Matter is a grey-skinned, frog-like, bipedal alien who is only 5 inches tall.[1] He has large, orange eyes, with rectangular pupils. He wears a green jumpsuit with a black stripe going down the middle of the chest, which connects to black rings around his neck and waist, black rings around his wrists, and black coloring from the knees down.

Grey Matter wears the Omnitrix symbol on his back.

Grey Matters species also created Upgrades species, Galvan B

Powers and Abilities

  • Enhanced Intelligence
  • Accelerated Calculations
  • Small Space Maneuvering
  • Enhanced Strength
  • Enhanced Durability
  • Enhanced Jumping/Sharp Teeth
  • Wall Crawling
  • Underwater Breathing

Grey Matter's small size belies his great calculative and technical intellect. He can create complicated machines from spare parts, understand the function of any device at a glance, and make sophisticated repairs to complex machines. Grey Matter's intellectual and analytical prowess aids him in succeeding his opponents in difficult situations. In conjunction, his intelligence makes him a natural problem solver, enabling him to think more strategically when brute force is inefficient.

Grey Matter can sometimes manipulate living things by stimulating certain parts of their nervous system, if such beings can be controlled by an external stimulus.

Grey Matter's size allows him to squeeze into small spaces and can climb walls due to tiny suction cups on his skin. He also has sharp teeth and his slimy skin makes him difficult to grab.

Despite his small size, Grey Matter is durable enough to withstand being throw against a wall.[2] He is also strong enough to carry a fork with both of his hands.[3]

Grey Matter is capable of breathing underwater thanks to his gills[4], making him amphibious.


  • Small Stature
  • Strength Limit
  • Vulnerability to Fire
  • Vulnerability to Being Thrown
  • Vulnerability to Strong Winds

Grey Matter's small stature makes him ill suited for physical battle[4], so he must outsmart his enemies in a fight.

Animals, such as cats and dogs, can be troublesome, as Grey Matter may appear to them as a plaything or a small snack.

Grey Matter is vulnerable to fire.[5]

Grey Matter can be easily thrown and lifted by species with as much or more strength than a Chimera Sui Generis.[5]

Because he is light, Grey Matter can easily be blown back by strong winds.[6]


Ben 10


Ben 10

Season 1

Season 2

Video Games

Ben 10

Grey Matter is a playable alien character in the game. He is initially unavailable, but is unlocked towards the end of the The City level.

Grey Matter is equipped with a mechanical backpack that assists him in combat, being able to fire energy blasts and vortices that drag enemies near.

Grey Matter's small size allows him to enter small areas that the rest of Ben's aliens, and Ben himself, are unable to access.

Grey Matter's Ultimate Ability consists of him modifying his backpack to shrink enemies down to a microscopic level, then stepping on them.

Grey Matter is vital for progression on the The City, the The Funhouse, the The Scrapyard and the The Hive levels of the game.

Naming and Translations

Language Name Origin
Russian Гуманоид From гуманойд, humanoid


  • Grey Matter's outfit is a combination of his outfits from the original series and Omniverse.
  • Despite being replaced with Slapback beginning in Season 3, Grey Matter may likely return in a future season.[DR 1]
    • If Grey Matter were to appear in Season 4, he would control a big armor of his Omni-Kix form.[DR 2]
  • Grey Matter is Montserrat Hernandez and Tara Strong's favorite alien.[MH 1]

See Also


Crew Statements

Duncan Rouleau

Montserrat Hernandez

Introduced in Season 1 CannonboltDiamondheadFour ArmsGaxGrey MatterHeatblastOverflowStinkflyUpgradeWildvineXLR8
Introduced in Season 2 RathShock Rock
Introduced in Season 3 HumungousaurSlapback
Introduced in Season 4 Jetray
Omni-Enhanced Aliens CannonboltDiamondheadFour ArmsGrey MatterHeatblastOverflowStinkflyWildvineXLR8
Omni-Kix Aliens CannonboltDiamondheadFour ArmsHeatblastHumungousaurJetrayRathShock RockSlapbackXLR8
Omni-Naut Aliens Heatblast
Fusion Aliens Amalgam BenGrey ArmsXLRArmBlastDiamondHeat
Non-Canon Aliens Banana AlienHot Dog AlienMole-Stache
Non-Canon Fusion Aliens Omnitrix Glitch FusionRath ArmsShock Blast

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