Pokémon Brilliant Diamond is a role-playing game (RPG) developed by ILCA under the direction of Game Freak and published by Nintendo and The Pokémon Company. It is a remake of the 2006 Nintendo DS title Pokémon Diamond.
In the game, you travel through the Sinnoh region, catching and training Pokémon while working to become the Pokémon League Champion. Along your journey, you'll battle Gym Leaders, stop the plans of Team Galactic, and encounter the Legendary Pokémon Dialga.