Completely out of the blue we’re getting an entirely new Pokémon adventure! Set in the Sinnoh region of old you’ll set out to create the Sinnoh Pokédex!

Here’s what the official Pokémon website has to say:

A Bold New Direction

The Pokémon Legends: Arceus game honors past Pokémon games’ core gameplay while infusing new action and RPG elements.

You’ll need to catch, survey, and research wild Pokémon in a long-gone era of the Sinnoh region to create and complete the region’s first Pokédex.

Catch Pokémon

To catch Pokémon in the Pokémon Legends: Arceus game, you can observe them to learn their behavior, then carefully sneak up, aim your Poké Ball™, and let fly!

You can also have your ally Pokémon battle wild Pokémon that you hope to catch. Just throw the Poké Ball holding your ally Pokémon near a wild Pokémon, and you’ll seamlessly enter battle and command your Pokémon by choosing from moves it knows.

An Adventure in the Sinnoh of Days Gone By

You’ll be brought to the Sinnoh region, the setting for the Pokémon Diamond and Pokémon Pearl games. But this story unfolds in a long-gone era, before ideas such as being a Pokémon Trainer or having a Pokémon League even existed.

All around, you’ll find Pokémon living wild in harsh environments that make for a Sinnoh unlike the region you may remember from the days of the Pokémon Diamond and Pokémon Pearl games.

Meet Your First Partner Pokémon

As you start off on your adventure to create the region’s first Pokédex, you’ll be able to choose Rowlet, Cyndaquil, or Oshawott as a partner.

These three Pokémon arrived with a Pokémon Professor, who encountered them on research excursions to various regions.​

The game is presently listed as Single Player with no multiplayer features presently planned.

Pokémon Legends: Arceus is planned to release on the Nintendo Switch early 2022.

Source: pokemon.com, SerebiiNet