Here is an overview of the game, via The Pokemon Company:
The fun of exploring while catching Pokemon and filling in a Pokedex has always been a core part of the Pokemon video game series. Pokemon Legends: Arceus was developed with the desire to deliver an experience infused with new action and RPG elements that go beyond the framework established thus far, while honoring the core gameplay of past Pokemon titles.
As Trainers explore the natural expanses in Pokemon Legends: Arceus, they’ll encounter Pokemon that call these grand vistas home. To catch wild Pokemon, players can study the Pokemon’s behaviors, sneak up to them, then throw Poke Balls. Players can also battle wild Pokemon with their ally Pokemon. By throwing the Poke Ball holding their ally Pokemon near a wild Pokemon, players will seamlessly enter battle. This new gameplay angle is intended to provide Trainers with an immersive experience.
Pokemon Legends: Arceus brings Trainers to the vast Sinnoh region as it existed in the past, long before the setting for Pokemon Diamond and Pokemon Pearl was established. Rich in nature and with Mount Coronet towering at its heart, this is a Sinnoh unlike anything Trainers have experienced before as they embark to create the region’s first Pokedex.
As they start off on their adventure, Trainers will be able to choose either Rowlet, Cyndaquil, or Oshawott as their first partner Pokemon. These three Pokemon arrived with a Pokemon Professor, who encountered them on research excursions to various regions.
- Category: Grass Quill Pokemon
- Height: 1′
- Weight: 3.3 lbs.
- Type: Grass/Flying
This Pokemon from the Alola region uses photosynthesis to store up energy during the day and becomes active at night. It can silently glide to its target and begin pelting it with vicious kicks.
- Category: Fire Mouse Pokemon
- Height: 1’8″
- Weight: 17.4 lbs.
- Type: Fire
Cyndaquil, a timid Pokemon that is often curled up in a ball, is from the Johto region. The flames on its back flare up when it’s surprised and can also be used to protect itself when attacked.
- Category: Sea Otter Pokemon
- Height: 1’8″
- Weight: 13 lbs.
- Type: Water
Oshawott is from the Unova region and has a scalchop on its stomach. It uses the scalchop to retaliate against attacks and to break open hard Berries.
- Category: Alpha Pokemon
- Height: 10’6″
- Weight: 705.5 lbs.
- Type: Normal
Arceus is said to have shaped all there is in this world.