Nintendo announced yesterday and today via its regional sites its Nintendo Wi-Fi Connection service will be discontinued in North America, Japan and Australia. The closing of this service will affect online play and other features that depend on it for Wii and Nintendo DS/DSi titles. This means after May 20th, players won’t be able to online features for games such as Mario Kart DS, Pokémon titles, and Super Smash Bros. Brawl, among many others.
After the mentioned date, some apps will still work on the Wii and DS/DSi such as the Internet Channel, the Nintendo Browser for DS and DSi, the Wii Shop Channel, Nintendo Wi-Fi Connection Pay & Play, and YouTube. Take a look at the sources to see the list of games published and/or developed by Nintendo that will be affected.
[Sources]: Nintendo of America: Service Discontinuation: Nintendo Wi-Fi Connection Service [http://www.nintendo.com/consumer/info/services-update.jsp]; Nintendo: Nintendo Wi-Fi Connection service for Nintendo DS and Wii to end in May [http://www.nintendo.com/whatsnew/detail/vyWpoM6CBIe6FjW8NIY7bvzOrgBURhzw]; Nintendo – Australia: Termination of Nintendo Wi-Fi Connection [http://www.nintendo.com.au/termination-of-nintendo-wi-fi-connection], Nintendo Japan: 「ニンテンドーDS」および「Wii」ソフトの「ニンテンドーWi-Fiコネクション」サービス終了のお知らせ [http://www.nintendo.co.jp/support/information/2014/0227.html].