Pokémon Diamond is a role-playing video game developed by Game Freak and published by Nintendo for the Nintendo DS. Released in 2006, it is part of the fourth generation of the Pokémon series. Players assume the role of a Pokémon Trainer, exploring the Sinnoh region, capturing various creatures known as Pokémon, and battling other trainers. In Pokémon Diamond, players aim to become the Champion of the Pokémon League by defeating the Elite Four and the Champion. The game features new Pokémon, improved graphics, and online trading and battling capabilities through the Nintendo Wi-Fi Connection.