In the middle of a race, the servers of Nintendo WFC close (5/20/14) - YouTube
How to play Mario Kart DS (and other DS games) Online: The Easy Way! | Mario Kart Amino
Nintendo Support: How to Connect to the Internet
Nintendo Wi-Fi Connection Guidebook (ニンテンドーWi-Fiコネクションガイドブック) [NTR-JPN-7] (NDS) Japan - Complete Scans (1200 DPI) : Nintendo : Free Download, Borrow, and Streaming : Internet Archive
Nintendo Wi-Fi Connection in Animal Crossing: Wild World and Animal Crossing: City Folk shutting down on May 20th - Animal Crossing World
R.I.P. Nintendo Wifi Connection by jakelsm on DeviantArt
Nintendo WFC > NSO : r/wii
Nintendo DS and Wii wifi is dead, long live "Save Nintendo WiFi" | GBAtemp.net - The Independent Video Game Community
In The Wake of Nintendo Wi-Fi Connection - Wololo.net
Tutorial: How to Connect to WFC in MelonDS(Updated) - melonDS board