Homonculous Charm

"But the truly remarkable thing were the tiny ink dots moving around it, each labeled with a name in minuscule writing. Astounded, Harry bent over it. A labeled dot in the top left corner showed that Professor Dumbledore was pacing his study; the caretaker’s cat, Mrs. Norris, was prowling the second floor; and Peeves the Poltergeist was currently bouncing around the trophy room."

- Description.

The Homonculous Charm was a charm that, when cast onto a map, would enable its possessor to track the movements of every person in the mapped area, through labeled dots that moved around the parchment.

After charting the grounds and halls of Hogwarts Castle in the 1970s, on a piece of parchment that would go by the name of Marauder's Map, James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew cast this spell on it.

Appearances

 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Prisoner of Azkaban (film)
 * Harry Potter and the Prisoner of Azkaban (video game)
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Order of the Phoenix (video game)
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)
 * Harry Potter and the Half-Blood Prince (video game)
 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part 1
 * Harry Potter and the Deathly Hallows: Part 2
 * The Wizarding World of Harry Potter
 * LEGO Harry Potter: Years 1-4
 * LEGO Harry Potter: Years 5-7
 * ''Pottermore