The game can be controlled entirely from touchscreen, or with regular controls and TV mode on the Switch.
Shares in Nintendo Co., which is a shareholder of Pokemon Co., jumped as much as 3.5 percent in early Tokyo trading Wednesday.
There's been a lot of rumors, leaks and information regarding the supposed Pokémon game coming to Nintendo Switch, but this latest news all but confirms fans are getting an announcement before the end of May. The two new games go on sale November 16 at 5,980 yen ($55) apiece.
Also new to the game is the option for a second player to join in using the second Nintendo Joy-Con.
The game will support drop-in and drop-out co-op for two players, and can connect to Pokemon GO so you can bring your Pokemon Go team into Pokemon Let's Go.
Dedicated trainers can also splash out on a Poke Ball Plus, a special controller that will let you feel your Pokemon prey trapped inside it, and has motion controls, lights vibration, and sounds. The series will comprise two halves of the same game in Pikachu and Eevee versions. The gadget will initially be sold only in Japan.
"This new Pokemon title, developed by Game Freak, lets players explore the island of Tumblecube with their team of cute, cube-shaped characters known as Pokexel", says Shigeru Ohmori, director at Game Freak. He had hinted at the games announced on Wednesday in an interview in September, saying that the franchise and new gaming products had yet to reach their full potential. Although details are scarce, Ishihara said the new game will focus more on the Switch as a portable handheld device, while the just-announced games are designed with home gaming in mind.