The best tool for rom hacking of gba games right now is Pokemon Game Editor. It can download most of the other tools you will need as well as having a lot of built in tools that are really good.
Thanks KarateKid, You pointed me in the right direction, Game Development. But I still have need for hacking Help.
I looked through the Tuts for [Graphics] and only found Tuts for Inserting and Editing of Sprites and Titles. Any one out there that direct me to a Tut for Exporting/Ripping of the graphics for the DS level games?