>>56413468Shortly after Game Freak had ILCA remake Diamond and Pearl into Brilliant Diamond and Shining Pearl, they released Pokémon Legends Arceus, which acts as a Sinnoh game that takes place around the Meiji era. Sinnoh is called Hisui, and the name "Sinnoh" instead refers to the deity that the people worship. The Diamond Clan believes it to be Dialga and the Pearl Clan believes it to be Palkia. There's also the remnants of the Celestica Clan, the natives of Hisui, who believed Sinnoh to be Arceus. Your choices in the game determine whether you battle Dialga or Palkia at the Spear Pillar at the climax, and it takes on its Origin Forme like Giratina can in Platinum. You can find the other one later. Their Origin Formes are them trying to take on a form similar to Arceus, hence the rings, but they're still hideous.
