Nintendo Wi-Fi Connection was terminated by Nintendo starting on May 20, 2014, making it no longer possible to play this game online without hacking.
Mario Kart 8 and Mario Kart 8 Deluxealso support 12 players. The player can also turn off the CPUs when two or more players are present. Unlike past games, Mario Kart Wii supports 12 racers per race and all appear during any mode except Time Trial. Nintendo, learning from their mistakes in Mario Kart DS,have greatly improved the online multiplayer offering in this game. However, via a custom unofficial fan-made server known as 'Wiimmfi', you can still play online as of January 2021.
Mario Kart Wii is the second game in the series to support online multiplayer via the Nintendo Wi-Fi Connection(discontinued on May 20, 2014,). The game does support the Wii Classic Controller, Nunchuck, and the Nintendo GameCube controller as well. The game is packaged with the Wii Wheel accessory which is designed to house the Wii Remote to allow more intuitive and conventional steering. The game was released on Apin Japan, Apin Europe, Apin Australia, Apin the US and April 30th, 2009 in South Korea. Mario Kart Wii, stylized as MARIOKART Wii and abbreviated as MKW and MKWii is a kart racing video game by Nintendo for the Wii console and the sixth game in the Mario Kart series, the fourth for a home console.