Pokémon Sleep is an upcoming mobile game for iOS and Android as part of the Pokémon series. It is currently being developed by Select Button, with assistance by Pokémon Go developer Niantic, and published by The Pokémon Company.[1] It was announced on May 28, 2019 by Tsunekazu Ishihara, CEO of the Pokémon Company, during a press conference held in Tokyo as well as on the company's official Twitter page.[2][3] The game is planned to be released in 2020.[4]