Grey Matter

Grey Matter is an alien used by Ben Tennyson within the Omnitrix.
==External Links==
*Grey Matter (Classic) on the Ben 10 Wiki
*Grey Matter (Reboot) on the Ben 10 Wiki
*Grey Matter on the 5 Years later Wiki
Category:Good Characters
Category:Public Identity
Category:Galvan
Category:Male Characters
Category:Green Eyes
Category:No Hair
Category:Earth-Omega Characters