Pokemon Legends: Arceus is a valuable new entry in the franchise because of how much it contributes to the franchise's overarching lore. Most Pokemon games share a time period, which means fans only get glimpses of the Pokemon world's history through ancient ruins and stories told by certain NPCs. Pokemon Legends: Arceus puts players right in the middle of Pokemon history instead, detailing how Sinnoh became a united region and where Sinnoh's very first Pokedex started. Interestingly, Game Freak has taken Pokemon Legends: Arceus as an opportunity to not only contribute new things to Pokemon history but to retcon a few parts of the franchise's lore as well.