Pokémon Let's Go

'''Pokémon: Let's Go Pikachu! and Let's Go Eevee!''' are a pair of video games developed by Game Freak and published by The Pokémon Company and Nintendo exclusively for the Nintendo Switch. The games were released on November, 2018, and they are part of main series of Pokémon games

The two Pokémon Let's Go games are remakes of the 1998 video game – Pokémon Yellow and feature similar catching mechanics as in Pokémon GO. Players of Let's Go can also transfer supported Pokémon from Pokémon GO into Let's Go, which then grants access to the Mystery Box to catch Meltan in Pokémon GO.

Gameplay
Depending on the version, the player's starter Pokémon will be a special partner Pokémon, Pikachu or Eevee, that cannot be traded. Elements from the anime appear in the games, including Eevee's cry and increased appearances of Jessie and James. The game otherwise plays similarly to Pokémon Yellow: players traverse the Kanto region to become a Pokémon Trainer, challenge Gyms, and battle NPCs along the way.

The major difference between Let's Go and most main Pokémon games is in the catching mechanics. Instead of weakening wild Pokémon in the traditional battle system, players must throw Poké Balls in an encounter screen similar to the one in Pokémon GO. Wild Pokémon also appear in the overworld, not in random encounters in tall grass, which was a feature that carried over to Pokémon Sword and Shield.

Transfer from Pokémon GO
Players who own either version of Let's Go and reach Fuchsia City may transfer one or more Pokémon from Pokémon GO into Let's Go by using the GO Park in Fuchsia City. This is a one-way transfer – transferred Pokémon cannot return to Pokémon GO. A maximum of 50 Pokémon can be transferred at once. The player will receive candy in Pokémon GO for all transferred Pokémon, similar to transferring them to Professor Willow. Additionally, each performed transfer to Pokémon Let's GO grants Trainer 100 XP in Pokémon GO.

Supported Pokémon that can be transferred from Pokémon GO into Let's Go are as follows:
 * All Kanto-region Pokémon and their Alolan forms, including Shiny
 * excluding Mew
 * excluding Event Pokémon
 * Meltan
 * Melmetal

Mystery Box


Transferring Pokémon from Pokémon GO into Let's Go will unlock the Mystery Box in Pokémon GO.

Players can use Mystery Box to attract Meltan, similar to Incense, but it can only be used once every three days and must be unlocked again with another transfer from Pokémon GO to Pokémon Let's Go.

Special Research
On the release date of Pokémon Let's Go Pikachu! and Let's Go Eevee!, there was a Special Research series – Let's GO, Meltan released, allowing all Pokémon GO players to catch one Meltan without transferring any Pokémon into Pokémon Let's Go games.