When trying to determine what content to change from Diamond and Pearl, game designer Takeshi Kawachimaru felt that the designers should focus on changing only the most important things so as to make sure that it was not too different from the original games.
Când se gândea ce conținut să schimbe de la Pokemon & Pearl, designer-ul de joc Takeshi Kawachimaru a simțit ca ar trebui să schimbe doar cele mai importante lucruri pentru a fi siguri ca nu era prea diferit de jocurile originale.