The episodes The Battle of the Badge, It's Mr. Mime Time and Showdown at the Po-ké Corral feature Mewtwo in scenes that prelude this movie. These episodes were supposed to air before the movie premiere, but due to the anime's four-month hiatus after the seizures caused by EP038, the episodes ended up airing on September 17, 24, and October 8, 1998, respectively, whereas the movie premiered on July 18.
