Dr. Brainchild is a greenish skinned kid with the mind of a genius, probably due to his larger than normal head size. He's partly bald a ring of red hair around his head and a light bulb on top of his head. He rides around on a unicycle that enhances his own height. Ren came to this kid to see what was wrong with Stimpy. He only appeared in "Blazing Entrails".

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