A poster for the movie has revealed that the Pikachu short to be released alongside the film will feature Pikachu, Meowth and Dedenne. The title of the movie and the short will be revealed at a later date. Pokémon the Movie: 2015 will be released in Japan on the 18th of July.
The first trailer for the 18th Pokémon movie has been released along with a few small details. The trailer can be seen below and shows off Groudon, Kyogre and a shiny Rayquaza. The trailer teases that a few more legendary Pokémon may find their way to being in the movie in time.