Is you’re Wii flashing blue, it might be a message from Nintendo letting you know that the WiFi Connection service is shutting down. On May 20th 2014 Nintendo is shutting down the WiFi Connection service that’s been running since the early days of the DS. Once the service is shutdown, players will no longer be able to enjoy online play, matchmaking and leaderboards. Shutting down the Nintendo WiFi Connection will not effect Wii U and 3DS online play, just Wii and DS. A quote from Nintendo is written below:
We at Nintendo sincerely thank our fans for their continued support of our company’s legacy systems. Your enthusiasm for games made for these systems speaks to their longevity, and the passion of Nintendo fans.