Home / Series / The Grim Adventures of Billy & Mandy / Aired Order / Season 1 / Episode 16
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Billy's Growth Spurt

Billy eats too much junk food that makes him feel sick. Grim prepares him a remedy using his granny's recipe, but this medicine makes a parasite to start growing in Billy's back, which Billy names Yap-yap. In the following, Billy and Yap-yap continue eating junk food, so Mandy suggest to use the antidote to the original remedy. Eventually, Yap-yap, now looking like a smaller version of Billy, detaches himself from Billy (which would have technically cured Billy without the need of him drinking the anitdote), and tries to escape from the antidote. In the end, Yap-yap drinks the antidote and is destroyed.

English italiano
  • Originally Aired October 4, 2002
  • Runtime 7 minutes
  • Content Rating United States of America TV-Y7
  • Network Cartoon Network
  • Created February 24, 2020 by
    Administrator admin
  • Modified February 24, 2020 by
    Administrator admin
Name Type Role
Maxwell Atoms Writer
Maxwell Atoms Director