Yeah, You lot knew this was coming!
Pokémon: Let's Go, Pikachu! and Let's Go, Eevee! are set in the Kanto region and will include the original 151 Pokémon creatures in addition to their respective Alolan forms from Pokémon Sun and Moon. Let's Go, Pikachu! and Let's Go, Eevee! will feature common elements of the series, such as battling non-player character Pokémon Trainers and Gym Leaders with caught Pokémon creatures. However, instead of battling them like the traditional battle system of other major Pokémon role-playing games, the catching of Pokémon creatures uses a different mechanic that is based on the mobile spin-off game Pokémon Go where players throw Poké Balls at a wild Pokémon by using the motion controls of the Joy-Con controller.The action can also be performed with a button press when the Joy-Con controllers are docked to the console in hand-held mode, but this still requires using the motion controls to aim.If a player uses the motion controls, the catching of Pokémon is based on the player's timing rather than accuracy. Although it is possible to miss a throw, the ball is almost guaranteed to hit the Pokémon.
The player character will start with either a Pikachu or an Eevee—depending on the version—which will sit on the player character's shoulder in the overworld. This mechanic is similar to the "walking Pokémon" mechanic first introduced in Pokémon Yellow, in which Pikachu followed the player character throughout the entire game.The player character's partner Pokémon will wiggle its tail when the player is near a hidden item, and it can be dressed up for further customization. Similarly to Pokémon HeartGold and SoulSilver, the player may also choose a secondary Pokémon to follow them,and some larger Pokémon can also be ridden, a mechanic first seen in Pokémon X and Y and later refined in Sun and Moon.
A notable feature in Let's Go, Pikachu! and Let's Go, Eevee! is that wild Pokémon show up in the overworld, rather than as random encounters in grass or caves like in previous main-series Pokémon RPGs. To start a battle, the player has to simply interact with a Pokémon in the environment. The battle screen is reminiscent of Pokémon Go, with the use of berries to pacify a Pokémon and the toss of a Poké Ball to capture it.
The evolution mechanic from previous games returns in Let's Go, Pikachu! and Let's Go, Eevee!; however, the player's starting Pikachu or Eevee cannot evolve, alike Pokémon Yellow. Only other Pokémon that the player has caught can evolve, including the ones of the same species of the partner Pokémon. Some features, like Pokémon breeding and HMs, will be absent from the games.
The games are scheduled to be released worldwide on November 16, 2018.