Pokemon Diamond and Pearl is an RPG developed by Game Freak for the Nintendo DS. It was first released in Japan in 2006, and then in 2007 it was released for the rest of the world. Diamond and Pearl are the fifth installment of the Pokemon franchise and has sold 18 million copies since its release. It exceeded its predecessors Ruby and Sapphire by 1 million copies, and Fire Red and Leaf Green by 3 million copies. Despite their similarities Diamond and Pearl are seperate games from one another.