|Home World||Galvan Prime|
|Alternate Counterparts||Dark Matter|
|Powers and Abilities|
|First Appearance||Giant Woman|
Grey Matter is the Omnitrix's DNA sample of a Galvan from the planet Galvan Prime in Omnifusion.
Grey Matter is small and grey, with big green eyes and gills on the side of his head. He wears a green jumpsuit and the Omnitrix is on his back.
Powers and Abilities
- Enhanced Intelligence
- Wall climbing
- Grey Matter is very small, and can hurt with little effort.
- Giant Woman
- Season 1 Finale: Invasion From Homeworld
- Time Out
Grey Matter is named after the gray matter that makes up the brain's central nervous system, he is also named after the stereotypical "Little grey man" Alien archetype
- Grey Matter's DNA Donor may be the one who created the Omnitrix itself