The games are to be released on 28 Sept.
the new legendaries are called パルキア Parukia & ディアルガ Diaruga.
パルキア Parukia will debut on Peal, and it has the ability to distort space.
ディアルガ Diaruga will debut on Diamond, and it has the ability to control time.
Also, a new TV anime season, called Pokemon Diamond & Pearl, is coming this fall.