Dr. Lobe is the main character, and headmaster, of the Big Brain Academy series. He is a humanoid character often seen with a staff, "graduation" hat and a trolley.
Big Brain Academy (DS)
He appears as the headmaster of the game, with lower graphics of his artwork from the sucessor.
He reimages his role on Big Brain Academy (the original DS game). Instead of being 2D, he's 3D.