Mario Party 9 is a party board video game for the Nintendo Wii console. It is the 12th game in the "Mario Party" series. It was developed by Nd Cube and published by Nintendo. It is the second and last game for the Wii (the first being "Mario Party 8"). It was released on March 2, 2012 in Europe, on March 8, 2012 in Australia, on March 11, 2012 in North America, on April 26, 2012 in Japan, on June 29, 2012 in Hong Kong, and on April 11 2013 in South Korea.