Gaming@NINA

http://www.emulator-zone.com/doc.php/nds/ideas.html

It can play pokemon but as per usual it's very slow but you don't have to download any extra files like the No$GBA. I'd still go with the No$GBA beacause it's a little bit faster.

ALSO...........
                   
                      I was looking at other emulators and the DeSmuME is able to  have a larger screen ???

yes it is out and its been out for about 2 weeks....no$gba is still a much better choice all round