Animagus reversal spell

The Animagus reversal spell (incantation unknown) was an untransfiguration spell that returned an Animagus back into their human form.

Nature
It manifested as a bright blue light and might need to be performed by more than one wizard. If performed on a non-animagus, the spell would have no effect and would not harm the animal.

History
This spell was used in the spring of 1994 by Sirius Black and Remus Lupin to reveal Ronald Weasley's pet rat Scabbers as Peter Pettigrew in the Shrieking Shack, exposing his true hidden identity to Ron Weasley, Harry Potter, and Hermione Granger.

Appearance

 * Harry Potter and the Prisoner of Azkaban  (First appearance) Chapter 19 (The Servant of Lord Voldemort)
 * Harry Potter and the Prisoner of Azkaban (film)
 * Harry Potter and the Prisoner of Azkaban (video game)
 * Wizarding World