The Inflating Charm (Inflatus) is a charm used to increase the size of the target by inflating it; once inflated beyond the maximum capacity of its outer size, the targeted creature will explode into colourful party balloons.
Harry Potter, Ronald Weasley and Hermione Granger used this spell on various creatures around the grounds of Hogwarts Castle throughout the 1994-1995 school year, under the authorisation of their Defence Against the Dark Arts teacher, Professor Bartemius Crouch Jr (who was disguised as Alastor Moody).
The prefix 'Inflate' derives from the English verb "to expand with oxygen".
- Harry Potter and the Goblet of Fire (video game) (First appearance)
- Harry Potter and the Prisoner of Azkaban
- Harry Potter and the Prisoner of Azkaban (film)