|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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- "Usefull for some potions, including Shrinking Solution."
In 1993, Neville Longbottom added too many rat spleens and too much leech juice into his Shrinking Solution, making it poisonous. Hermione Granger helped Neville fix the potion before Professor Snape had a chance to test it on Neville's toad, Trevor.
- Harry Potter and the Prisoner of Azkaban (First appearance)
- Harry Potter and the Prisoner of Azkaban (video game) (GBA version only)
- Harry Potter and the Half-Blood Prince (video game)
- The Road to Hogwarts Sweepstakes
- Wonderbook: Book of Potions
- Harry Potter: Hogwarts Mystery (Mentioned only)