Mario & Sonic at the Olympic Games is a sports game developed by Sega and released for the Wii in November 2007. It's the first official crossover game featuring the popular gaming characters of Mario and Sonic the Hedgehog. The game is officially licensed by the IOC, and the first official video game for the 2008 Summer Olympics to be held in Beijing.
The game features a total of 16 characters (including Mario and Sonic) who compete in various olympic events divided into four categories emphasizing 1) all-around, 2) speed, 3) power, and 4) skill. Each event makes use of the remote and nunchuck in different ways to compete. Similar to Super Mario Kart, each character has its own skillset and strengths distribute amongst the the four aforementioned categories. The game makes use of the WiFi connection to post and display results to and from a leaderboard so you can compare your results against other gamers.
There are 20 authentic Olympic events falling under 8 categories: 1) athletics, 2) gymnastics, 3) shooting, 4) rowing, 5) archery, 6) aquatics, 7) fencing, and 8) table tennis. You can compete in each of these event in either tournament, circuit, or a single-player mission mode.
Mario & Sonic at the Olympic Games was released for the Wii in November, 2006 worldwide, and will be coming to the Nintendo DS in January 2008.