I've read a few postes saying that NDS emu is not completed and resulting most games cannot be played.

Im new on this emu, so i want to ask a few questions

1) Is it possible to play nds rom using nds emu on a pc like vba games?

2) i really want to play pokemon diamond!! but it wont work when i click it, it says "error, not a nds file". I really need help on that, if u noe how to get it fix, plz reply, cuz me and my friend really wanna play that game XD

appreciate your help and thx again

1. Almost Impossible. in the present NDS emulators are still in their early stage, only runs a limited number of ROMs very slowly and crappy. My advice is that you shouldn't try emulating NDS roms now.
2.What emulator do you use to emulate that Pocket Monsters game?