Grey Matter

Grey Matter

Grey Matter (voiced by Richard Steven Horvitz in the TV series and by Carlos Alazraqui in the live-action movie) is a Galvan (the former a play on actual grey matter and Greys, the latter a play on galvanization) from the tiny planet Galvan Prime.^[7] Ben first transformed into Grey Matter in "Washington B.C." when he saw that a gold Sumo Slammer card could be found in a box of cereal. Gwen found him looking for the card in the cereal boxes at the supermarket. Though Grey Matter is rarely used, it is a common result of accidental transformations, such as in "A Small Problem".

Grey Matter is a gray-skinned, frog-like alien only six inches tall, but his size belies his intellect, which is second to none. He can create almost anything from spare parts and deduce the function of any device from a simple glance. His size allows him to squeeze into small spaces, and he can climb walls thanks to tiny suction cups on his skin. However, Grey Matter's size makes him unsuited for battle, and hence Ben must outsmart his enemies while using the form.^[7] Showing a more light-hearted side of the Omnitrix, Ben, despite being able to understand any device, does not consciously comprehend what he is doing, leading him to remark as much.