Mario & Sonic at the London 2012 Olympic Games

Mario & Sonic at the London 2012 Olympic Games (マリオ&ソニック AT ロンドンオリンピック?) is a 2011 sports video game developed by Sega Japan. It was published by Nintendo for Japan and by Sega for North America, Europe, and all other regions. The game is officially licensed by the International Olympic Committee (IOC) through exclusive licensee International Sports Multimedia. It is the third installment in the Mario & Sonic series after the commercial success of its predecessors and is an official video game of the 2012 Summer Olympic Games. The game was released on the Wii on November 13, 2011 in Europe, November 15, 2011 in North America, November 17, 2011 in Australia, and December 8, 2011 in Japan. The game is the first to come in a yellow keep case instead of a standard white case, similar to how New Super Mario Bros. Wii, was the only game to have a red keep case.

Excessive Bloom
If you have "Disable Fog" enabled, there will an excessive amount of bloom visible during the Badminton event.

To fix this, make sure you have "Disable Fog" disabled, which can be found in the "Graphics" window, in the "Hacks" tab under the "Other" group.