Mew (Japanese: ミュウ, Hepburn: Myū) is a fictional species from the Pokémon franchise. A small, pink, Psychic-type Mythical Pokémon, it was added to Pokémon Red and Blue by its creator, Game Freak programmer Shigeki Morimoto, with the intent of making it obtainable, but was left out for development and technical reasons. After being discovered through data mining, its presence in the games was surrounded by rumors and myths, contributing to the Pokémon franchise's success. For years, Mew could not be legitimately obtained in the games except via Pokémon distribution events or glitching.

Mew's first film appearance was in Pokémon: The First Movie as a main character alongside Mewtwo. The movie revealed that a fossilized Mew eyelash, found in the Guyana jungle by a team of scientists, was used to create Mewtwo, a genetically enhanced Mew clone. Mew later appeared in Pokémon: Lucario and the Mystery of Mew as a main character alongside Lucario; the backstory of the film revolves around Mew's mysterious history and how it came to be so powerful. Pokémon: The Mastermind of Mirage Pokémon had a mirage version of Mew appear as a main character in the movie who helped Ash and friends try to defeat the Mirage Master.