So how will the Pokémon Company follow up the success of Niantic's Pokémon Go? At a press conference today they revealed Pokémon Sleep, a new mobile game that tracks your time sleeping to unlock new characters. It's being made by Pokémon Magikarp developer Select Button. There's also some new hardware with a Pokémon Go Plus + that works as a sleep tracker thanks to its integrated accelerometry, and also works just like the $35 Pokémon Go Plus accessory for use with that game.