Smarten Up!
The Grim Adventures of Billy and Mandy Temporada 2 Capítulo 16
Smarten Up!Emitido:
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Billy is worried about failing an upcoming Math test, so Grim gives him a "bookworm", which will make him much smarter. Milkshakes, Billy's cat, eats the worm instead, and is forced to tutor Billy. Billy is still an idiot in the end.