In anticipation of Pokemon Platinum, Nintendo gave IGN a rare opportunity to interview Game Freak director Junichi Masuda and game designer Takeshi Kawachimaru.
Mr. Masuda has been with Pokemon since Day One on the original Game Boy providing much of the audio. He directed the original DS games Diamond and Pearl, and composed much of the music in the design. Mr. Kawachimaru has been designing Pokemon since Pokemon Ruby and Sapphire, and in Pokemon Platinum he served as the game's director.
You can read the full interview at IGN's website: http://ds.ign.com/articles/956/956279p1.html