This complete walk through of "Pokemon Diamond & Preal Remaster" provides everything you want to know, including how and where to catch Pokemon's, the location of important items as well as how to use them during battles.
電玩太郎親自撰寫人中之龍8白金攻略
電玩太郎又一力作 寶可夢朱/紫完全攻略
The Complete walkthrough with detail Maps
The most complete walkthrough covers everything you want to know in the game