A new trailer for Pokémon Let's Go Piakchu and Eevee has been released. This trailer features more about the Mythical Pokémon Meltan (officially confirmed at the end of Septmeber) and about a special Mystery Box that can be obtained when you send a Pokémon from GO to Let's Go. With the Mystery Box, Meltan will start to appear in GO and can be captured for a limited time (around 30 minutes). When the time is up the Mystery Box will close and the only way to open it again is to wait a set amount of time, and then send another Pokémon to Let's Go. Another video features the habit of Meltan and at the end of the video it showcase a silhouette of a Pokemon resembling Meltan (probably a new form).