 The recorded audio is then edited with Pro Tools, and the pitch is altered to make the voice sound more like that of a fourth grader.Fellow co-creator Stone has stated that Wendy's name is based on that of Wendy Westaburger, the wife of a friend from his childhood.Wendy first appeared in the 1995 sequel to Stone and Parker's 1992 film "The Spirit of Christmas", "Jesus vs. Santa", which was developed after Fox executive Brian Graden paid Stone and Parker $1,000 to make another animated short as a video Christmas card that he could send to friends.