Pokémon: Lucario and the Mystery of Mew is a 2005 Japanese animated fantasy film directed by Kunihiko Yuyama and produced by OLM, Inc. It is the eighth installment of the Pokémon film series. The film stars the voices of Rica Matsumoto, Ikue Ōtani Yūji Ueda, Kaori, Fushigi Yamada, Megumi Hayashibara, Shin-ichiro Miki, Inuko Inuyama, Daisuke Namikawa, Satomi Kōrogi, Takeshi Aono, Noriko Hidaka, Kōichi Yamadera, Kumiko Okae, Momoko Kikuchi, and Becky. It was released in theaters in Japan on July 16, 2005, followed by the Japanese DVD and VHS releases on December 22, 2005.

The English dub was done by 4Kids Entertainment and was first released on DVD in Australia on August 16, 2006, with the US release following on September 19, 2006. The English dub of the movie premiered in the US for the first time at the 2006 San Diego Comic-Con. The film aired in the United Kingdom in July 2007 on Cartoon Network. This is also the last Pokémon film to be dubbed in English by 4Kids Entertainment, who have been dubbing Pokémon from the start of the television series in 1998. All future Pokémon episodes and films would be dubbed by The Pokémon Company International. The events of the film take place during the eighth season of the Pokémon anime.

Pokémon: Lucario and the Mystery of Mew was one of the four nominees for the American Anime Awards' "Best Anime Feature" award, but it lost to Final Fantasy VII: Advent Children.