Harry Potter Kids
The Harry Potter Kids are a group of students roleplaying as characters from the Harry Potter universe. They appear in the Season Six episode "The Return of the Fellowship of the Ring to the Two Towers".
Background
As the boys were playing Lord of the Rings, they were tasked to return a pornographic tape to the video store. Along the way, they encounter a group of kids playing Harry Potter and casting spells on one another, with Eric Cartman taunting them for being "fags".
As the boys were being chased by the 6th graders, Cartman suggested to cross a nearby river as he claims that "6th graders can't stand water". Craig Tucker opposed to this and decided to join the Harry Potter kids instead.
Appearance
The kids are dressed up as students and faculty staff of the Hogwarts School of Witchcraft and Wizardry (Severus Snape, Ron Weasley, Harry Potter).