"Pokémon Brilliant Diamond" is a part of the Pokémon video game series, developed by Game Freak and published by Nintendo and The Pokémon Company. It's a remake of the original "Pokémon Diamond," which was released for the Nintendo DS. "Brilliant Diamond" was released for the Nintendo Switch, featuring updated graphics and various improvements over the original game while maintaining the core gameplay and storyline. The game is set in the Sinnoh region and allows players to choose a starter Pokémon and embark on a journey to become the Pokémon Champion. Along the way, players catch and train Pokémon, battle other trainers, and thwart the plans of the nefarious Team Galactic. Like other Pokémon games, "Brilliant Diamond" emphasizes exploration, battles, and collecting Pokémon. It also includes features such as the Grand Underground, where players can dig for fossils and interact with Pokémon in their natural habitats, and Super Contest Shows, where Pokémon compete in showmanship. The game, along with its counterpart "Pokémon Shining Pearl," provides a nostalgic experience for those who played the original versions while also bringing new elements to newer fans of the series.