Mario Kart DS is a racing game developed and published by Nintendo for the Nintendo DS. It is the fifth installment in the series and the first to use Nintendo's free online service, Nintendo Wi-Fi Connection. The game was released in the North America, Australia, and Europe in November 2005, and in Japan in December 2005, and in South Korea in which it is the very first Wi-Fi Connection game launched in April 2007. It was well received critically, scoring an average of 91% from Metacritic.