Pokémon Legends: Arceus will be Game Freak's approach to a sandbox RPG set in the Pokémon universe. You will be able to roam the huge landscape, attempting to capture, train and fight other Pokémon you encounter on your travels. However, one big question that arises is about multiplayer. Pokémon Legends: Arceus has multiplayer and how will it work?
Even with the multiple early evolution leaks, the alleged legendary forms for Palkia and Dialga, and numerous others, we don't have too many details on how multiplayer will work in Pokémon legends.
However, given the way combat appears to work in the game, it is very different from the traditional Pokémon experience. You will fight in the underworld against opposing Pokémon, switching from an Agile to a Strong fighting style, increasing the speed or damage of your moves based on the form you use. Due to how fundamentally different the gameplay is, multiplayer battles likely won't be the focus of Pokémon Legends.
While combat may not appear, there may be trading stations in the game that you can use to trade Pokémon with friends. These details have been shared on the official Pokémon History Page, directly informing you that the trading stations you find in the Village of Jubilation allow you to trade your Pokémon with other trainers. This will likely be the only way to trade Pokémon with others, potentially evolving those with these requirements.
The commercial aspect appears to be only the confirmed multiplayer aspect of the Pokémon that was carried over from the original games.