I fear that you will find anything about pascal and gba/nds
However, there is a plenty of generic tutorials about nds and gba programming that you can understand even if you don't know c/c++. Among others, I suggest these two:

http://dev-scene.com/NDS/Tutorials (unfinished, but very good)
http://tobw.net/dswiki/index.php?title=Graphic_modes (this one is about video modes and memory mapping)