At least some content in this article is derived from information featured in Harry Potter: Hogwarts Mystery. Spoilers will be present within the article.
At the start of the 1988–1989 school year at Hogwarts School of Witchcraft and Wizardry, when teaching hex-deflection to her fifth year Defence Against the Dark Arts, Professor Patricia Rakepick stated at the start of the lesson that she would be willing for students to use this hex in class, along with the Bat-Bogey Hex, and she was prepared to reverse them if needed.
In 1995, during the fourth year hex-deflection test for Defence Against the Dark Arts at Hogwarts, Harry Potter was hit with this hex by Bartemius Crouch Junior, who was disguised as Alastor Moody using Polyjuice Potion during that time, leaving him with an irritating case of twitchy ears after the class had finished.
- Harry Potter and the Goblet of Fire (First appearance)
- Pottermore (Mentioned only)
- Wonderbook: Book of Spells (First identified as Twitchy-Ears Hex) (Mentioned only)
- Harry Potter: Hogwarts Mystery (Mentioned only)