Hey everyone, confirmed that Pokémon Let's Go is coming to the Switch, which is connected to Pokémon Go, and like the mainline games, comes with two versions, Pikachu and Eevee, which are the starter pokemon you have to start off with. Also stated, that there is still a mainline, core RPG coming out in 2019. These two games aren't the ones GameFreak has been teasing the public with, more like an extension, using these two as a way to bring in new audiences, young and old, into the series.
The graphics look like something from Pokémon Go, and while not much else has been given, except the game, like Pokémon Go, has it's own little external device like the Pokémon Go Plus, a Pokeball Plus. The release date is for November 16 of this year, and there is already a website for it, check it out.