After Synchronizing Pokemon GO to Pokemon: Let's Go, Pikachu, you will be able to send Pokemon from Pokemon GO to Pokemon: Let's Go, Pikachu. In order to send Pokemon from the Mobile Game to the Switch Game, you will need to go into the Pokemon Menu on Pokemon GO after the two games have connected to one another. While in the Pokemon Menu, a Nintendo Switch Icon should appear. By clicking on it, your menu will then shift to what Pokemon you can and can't send. All Pokemon from the Kanto Region, including ones in their Alolan Forms and Meltan/Melmetal, can be sent to Pokemon: Let's Go, Pikachu, except for Pokemon you have favorited and Event Pokemon that adorn unique hats or clothing.
Up to 30 Pokemon can be sent from Pokemon GO to Pokemon: Let's Go, Pikachu at any given time; however, once sent, the Pokemon cannot be returned to Pokemon GO. Once transferred, players can go to the receptionist in Pokemon Go Park in Pokemon: Let's Go, Pikachu and decide which of the twenty different areas of Pokemon Go Park to send the Pokemon. From here, the transfer process will begin. Once the transfer of Pokemon has completed, you will receive a notification about the Mystery Box that will tell if it's ready to be opened or how much longer you must wait to open it again.
Need some help in Pokemon GO? Check out our Pokemon GO Guide!