I Was Bitten
S01E18 Billy's Growth Spurt
Billy indulges in too much junk food, which leaves him feeling ill. To help, Grim concocts a remedy based on his grandmother's recipe, but instead, it causes a parasite to develop on Billy's back, which he whimsically names Yap-yap. As they continue their junk food binge, Mandy suggests using the antidote to counteract the original remedy. Eventually, Yap-yap, now resembling a mini Billy, separates from him, trying to escape the antidote. Ultimately, Yap-yap consumes the antidote, leading to his demise and freeing Billy from the unwanted guest.
Season 1 Episodes
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2
2
3
3
4
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5
5
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Effects of venom on the body
Meet the Reaper
Episode 2
Skeletons in the Water Closet
Most Extreme Bites
Opposite Day
Look Alive!
Danger can lurk in one's backyard
A woman is mauled by a tiger
Mortal Dilemma
Episode 6
Get Out of My Head!
Fiend Is Like Friend Without the 'R'
Recipe for Disaster
A Dumb Wish
Grim vs. Mom
Tastes Like Chicken
Grim or Gregory?
Something Stupid This Way Comes
A Grim Surprise
Beasts and Barbarians
Hoss Delgado: Spectral Exterminator
To Eris Human
Billy's Growth Spurt
Billy & the Bully
Big Trouble in Billy's Basement
Tickle Me Mandy