Pokémon Brilliant Diamond is a role-playing video game developed by ILCA and published by Nintendo and The Pokémon Company. Released in November 2021, it is a remake of the original Pokémon Diamond from 2006. Players explore the Sinnoh region, capturing and training various Pokémon while battling other trainers and gym leaders. The game features updated graphics and quality-of-life improvements, making it more accessible for new players. It retains the core gameplay mechanics of the original, including turn-based battles and the ability to trade and battle with friends. Players can also experience the Grand Underground and participate in various activities.