There currently aren't any movies with tulpas in them. There have been various movies over the years featuring imaginary friends (often in a bad light).
However, tulpas are getting popular in the Creepypasta fandom, and various short videos/independent films have been appearing lately on youtube about tulpas.
Various TV shows have featured tulpas (again in a bad light). Supernatural, Disney's So Weird and the X-Files each have an individual tulpa episode.