Slappy the Dummy is a fictional character and major antagonist in the Goosebumps children's horror novel series by R. L. Stine.

[1] He is also the main antagonist of the franchise's film adaptation and its sequel, described by their interpretation of Stine as having a "serious Napoleonic complex" in the former.

He comes alive when the words, "Karru Marri Odonna Loma Molonu Karrano," which roughly translates to "You and I are one now" (meaning he and whoever brings him to life will become inseparable) and can be found on a sheet of paper in the coat pocket of Slappy's jacket, are read aloud.

[2] Magic, a 1978 horror film where a dummy is thought to commit evil acts, was another one of R. L. Stine's inspirations for Slappy.

A girl named Jillian takes her little sisters Katie and Amanda, accompanied by their doll Mary-Ellen, to a puppet show.

After a series of troublesome events, Jillian and Harrison host a birthday party and try to put on a show, only to have it be revealed that Mary-Ellen is alive and that she revived Slappy so she could marry him.

[7] He was first manufactured by Goldberger Doll corporation after a nine-year-old boy from Long Island sent them a letter suggesting the idea in 1998.

The title is GASLIGHTED.This was published on 30 September 2014 as Gaslighted: Slappy the Ventriloquist Dummy vs. Aloysius Pendergast in the anthology Face Off edited by David Baldacci.