Pokémon Diamond, Pearl, and Platinum are role-playing video games developed by Game Freak and published by Nintendo for the Nintendo DS. Released in 2006 and 2007, these games are part of the Pokémon series and introduce players to the Sinnoh region, where they can capture and train various Pokémon to become a Pokémon Champion. In these games, players embark on a journey to defeat Gym Leaders, challenge the Elite Four, and thwart the plans of the villainous Team Galactic. Platinum is an enhanced version of Diamond and Pearl, featuring additional content, new forms of Pokémon, and improved gameplay mechanics.