Ben 10 Planet

Grey Matter

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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 that is only four inches tall. 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.

Powers and Abilities

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 intellect serves as a problem solver and analytical help in difficult situations. This allows Grey Matter 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 external stimuli.

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.

Grey Matter is amphibious and has gills.


Grey Matter's small size makes him ill-suited for physical battle, so he must outsmart his enemies in a fight. Animals like dogs and cats can be a problem, as they may see Grey Matter as a chew toy or food to them.


Ben 10

  • Grey Matter first appeared in The Filth, where he watched some cartoons.
  • In Take 10, Grey Matter attempted to take the phone away from Gwen.
  • In Shhh!, Grey Matter attempted to get Gwen to make noise.
  • In Something I Ate, Grey Matter entered the Slurpstack in order to save Max.
  • In All Wet, Grey Matter stopped Frightwig.
  • In Hole in 10, Grey Matter defeated the Ground Hawg Leader and became the new one.
  • In Need for Speed, Grey Matter sneaked into the Communication Office.
  • In Forgeti, Grey Matter defeated Gill.


Ben 10

See Also

Ben 10 Reboot Aliens
Introduced in Ben 10
CannonboltDiamondheadFour ArmsGrey MatterHeatblastOverflowStinkflyUpgradeWildvineXLR8
Fusion Aliens
Amalgam BenGrey Arms