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.
The most complete guide for Platinum achievement
The most comprehensive walkthrough including the new content from DLCs
電玩太郎又一力作 寶可夢朱/紫完全攻略
Provides everything you need to know for surviving in forbidden west.