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
The most complete guide for Platinum achievement
Sand Land Complete Walkthrough
Provides everything you need to know for surviving in forbidden west.