Billy's cousin from the center of the Earth, Nergal Jr., goes to school for the first time, but he is worried that people may not like him. Soon enough, Junior becomes bullied by Sperg, with Miss Butterbean's allowance. Then, Billy suggests Junior to use his shape-shifting powers to take the form of Miss Butterbean, so Junior can help him pass a math test. Junior likes the idea, but he morphs into Miss Butterbean to get revenge on Sperg instead. In the end, Sperg is seen living in the center of the Earth as Junior's pet.
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The Grim Adventures of Billy and Mandy - 3x17 Substitute Teacher
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired Jul 30, 2004
- Episode 3x17
- Show special No
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