: There is an official Pokémon Legends: Arceus Special Art Book and various paper-based preorder bonuses like art cards or posters that were bundled with the physical Nintendo Switch game.

: Modified ROMs for the Switch version, such as Pokémon Mythic Arceus , exist to rebalance the game, increase difficulty, and add regional variants.

: Several fan projects, such as a Pokémon Legends: Arceus GBA ROM hack based on FireRed, attempt to recreate the Hisui region and mechanics like crafting and overworld catching in a 2D pixel-art style.

The official Nintendo Switch game has a file size of approximately and received a major free content update titled Daybreak (v1.1.0) , which added new mass outbreaks and requests.