Pokemon Brilliant Diamond and Shining Pearl is a turn-based tactical action game in a fantasy setting of legendary Pokemon. The game takes place in the sunny Sinnoh region, which is famous for its rich nature, and Mount Coronet rises in the center. Many myths were born here that are passed on from generation to generation. A professor known for his research into the evolution of Pokémon assigns you to visit various places in the Sinnoh region. The purpose of the trip is to create a Pokemon encyclopedia called the Pokédex.