ESRB has provided a rating for Pokémon Legends Arceus giving an overview of the game and its content. See what they had to say here.
The game is confirmed to arrive on January 28, 2022. It has been rated ahead of the release. Based on the rating, it is basically available for everyone with just Mild Fantasy Violence mentioned in the description.
This is an adventure/role-playing game in which players assume the role of an explorer tasked with catching and calming Pokemon. Players explore a strange land, interact with characters, perform missions, and battle various Pokemon. Most battles are turn-based, with players performing attack moves (e.g., bites, elemental attacks) to deplete opponents’ health meters. Some battles occur close-up, as players try to calm enraged Pokemon by throwing balms (bags containing the Pokemon’s favorite things) at them.
Here are some further details on the game taken from the Nintendo eShop page.
Action meets RPG as the Pokémon series reaches a new frontier
Get ready for a new kind of grand, Pokémon adventure in Pokémon™ Legends: Arceus, a brand-new game from Game Freak that blends action and exploration with the RPG roots of the Pokémon series. Embark on survey missions in the ancient Hisui region. Explore natural expanses to catch wild Pokémon by learning their behavior, sneaking up, and throwing a well-aimed Poké Ball™. You can also toss the Poké Ball containing your ally Pokémon near a wild Pokémon to seamlessly enter battle.
Pokémon Legends Arceus will be out on January 28, 2022, for the Nintendo Switch.