Nintendo officially shut down the Nintendo Wi-Fi Connection servers in 2014, but the community saved the game. Thanks to a custom server project called , thousands of players still race online every day.
Q: Can I play Mario Kart Wii with friends online? A: Yes, you can play Mario Kart Wii with friends online using a Wii console or a Wii emulator with online support. Mario Kart WII ISO -JPN-
Mario Kart Wii ISO -JPN- refers to the Japanese region disk image of the 2008 racing game, identified by the Game ID Nintendo officially shut down the Nintendo Wi-Fi Connection