Giant rat (creature)

The giant rat was a rat that lived in the cellar of the Leaky Cauldron. Once a normal rat, during the summer of 1993, it consumed a large quantity of rat tonic from Tom's stores. This over-consumption caused it to grow to an immense size.

Behind the scenes

 * In the Game Boy Advance version of the video game adaptation of Harry Potter and the Prisoner of Azkaban, Harry Potter battles the giant rat while searching the Leaky Cauldron's cellar for rat tonic to give to Ronald Weasley.

Appearances

 * Harry Potter and the Prisoner of Azkaban (video game)