Sheen is one math test away from being left back, so Jimmy turns his Brain Drain helmet into a Brain Gain helmet and uses it on his buddy, instantly quadrupling Sheen's IQ.
Where to Watch Sheen's Brain
Cast of Sheen's Brain
Dee Dee GreeneJimmy Neutron (voice)
Jeffrey GarciaSheen Estevez (voice)
Rob PaulsenCarl Wheezer (voice)
Megan CavanaghVox (voice)
Jim CummingsUltra Lord (voice)
Billy WestSam Melnick (voice)
Frank WelkerSpecial Vocal Effects (voice)
Andrea MartinMs. Fowl (voice)
Carolyn LawrenceCindy Vortex (voice)
Crystal ScalesLibby Folfax (voice)
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