As mentioned earlier, "Pokémon: The Arceus Chronicles" is an animated tie-in to "Pokémon Legends: Arceus." The game's story follows Rei or Akari — depending on which trainer is chosen by the player — as they're thrust into the past by a meddling Arceus. At this point, the selected trainer must help tame the wild region of Hisui, which later becomes Sinnoh, aka the region from "Pokémon Diamond" and "Pokémon Pearl." As the trailer suggests, "Pokémon: The Arceus Chronicles" will see Ash and his friends travel to Sinnoh to explore the history of the region. There are a number of nods to the game, as well as a faithful recreation of a historical village that would one day become Jubilife City.
Along with Arceus, the trailer promises a wellspring of other legendary Pokémon, including Uxie, Mesprite, Azelf, and Heatran. Dialga and Palkia look to be appearing, as well, considering how deeply connected they are to both Hisui and Sinnoh. In brief, Uxie, Mesprite, and Azelf are a trio of legendary Pokémon who represent human emotion, knowledge, and willpower, respectively. Dialga and Palkia are the gods of time and space, respectively. Heatran, on the other hand, is just a big lava monster, so that's cool.
