Nintendo released a promo video for the upcoming 3DS game Pokémon Super Mystery Dungeon (Pokemon Chou Fushigi no Danjon) during the Japanese Nintendo Direct on Sunday. The game will be released on the 17th of September in Japan and will have a suggested retail price of 4700 yen. It is currently slated for release in early 2016 in the West.
The trailer reveals that the game will feature all 720 Pokémon, including all legendary Pokémon, and will allow the protagonist to choose their partner from 20 different Pokémon. It also shows some gameplay footage and a brief shot of the new town.
The official Japanese website can be found here. An official trailer is featured below.