A Cornish Pixie is a magical creature that appears in LEGO Harry Potter: Years 1-4. In the Harry Potter storyline, they are blue, have mischievous thoughts, and when released, cause total chaos. Gilderoy Lockhart released these creatures in his first Defense Against the Dark Arts class, and they created pandemonium by throwing Lockhart's wand out the window, ripping books, stealing pictures, and hanging Neville Longbottom on a chandelier. They were finally subdued when Hermione Granger used Immobilus on them.
- In the video game, they steal Gilderoy Lockhart's hair.