Cartoon character named Brain?

Brains ( plural) was a character on the animated series Thunderbirds. He wore specs and was an engineer. He was responsible for the design and maintenance of most of the Thunderbird vehicles, and significantly, was NOT a member of the Tracy family. That"s the only one I can think of, pun intended, don your thinking cap! Brains was a puppet and thus not strictly speaking a cartoon character.

Pinky and The Brain, Pinky and The Brain...
One is a genius, and the other's insane...
They're laboratory mice,
Whose genes have been spliced...
They're dinky!
They're Pinky and The Brain, Brain, Brain, Brain,Brain,Brain,Brain,Brain...

Animaniacs!