It was released in Japan on December 19, 2009. It was produced by Masakazu Kubo who is known for producing the Pokémon films. Manga Entertainment UK dubbed and localized the film in English. Viz Media picked up the rights for bringing the film to the United States, and released it on November 8, 2011 . The film has also been developed into a novel, a manga, a film comic, an artbook, a board game, a range of plushies, and more.