Yeah! NWFC is reborn! Reborn by fans! What?
The fans made a new, unofficial server to play any nintendo DS online game in it. But it needs some unofficial thingies to make it happen.
How to do it? This website: https://github.com/polaris-/dwc_network_server_emulator/wiki
Only do it if you are darn crazy to get it back. Because it's darn hard to get a flashcard, a internet with WEP security and the roms patched. You have been warned!