Pokémon Diamond and Pearl are role-playing video games. They are the first installments in the fourth generation of the popular Pokémon video game series. Players control a virtual prankster called Diablade, whose main goal is to save the world from the evil villain Team Rocket. Players also control their own pokemon called 'Pokemon', who have a tendency to disappear. They can only escape by using the power of the Poké Ball.
After defeating the evil Team Rocket, the players must return to their own world. Diamond and Pearl must rescue their friends, who are trapped in their pokemon's bodies. Fortunately, Diamond's Pokemon know how to fight their foes. They are joined by the legendary Pokémon, Mewtwo, and Dialga. In the first part of the game, the players are introduced to the characters. Once they are reunited, they must face Team Rocket and the other Legendary Pokemon in the world.