Where can i download a Nintendo ds emulator?

no$gba is a complete utter **** emulator..... it has been a dead project since 2006.... wtf are you people smoking? get http://desmume.org/ click download, scroll down and click on "DeSmuME v0.9.8 Windows 64 bit binary" (im assuming you are using 64bit windows, if not use 32bit version, but 64bit version on a 64bit system runs much better) Extract the folder using winrar or 7z (google them). Then just run the desmume.exe (go into options and set up your settings. like control config, hotkey config, if the game is slow, go set frame skip to like 1-3) You will need rom images (games). you can google "game name + rom". some good places are emuparadise and coolrom. (note if you do no own the games, downloading them is piracy and illegal). Then just open the rom image and enjoy. Use mouse for stylis. Note emulation is VERY cpu intensive, you will need a very min of a 2.0ghz dual core processor to play it. If you want to get full speed you will need like a 2.6-3.0ghz dual core (depending on the game).

http://www.coolrom.com/emulators/nds/