A distinguishing feature of the console is its wireless controller, the Wii Remote, which can be used as a handheld pointing device and can detect acceleration in three dimensions. Another is WiiConnect24, which enables it to receive messages and updates over the Internet while in standby mode.
Nintendo first spoke of the console at the 2004 E3 press conference and later unveiled the system at the 2005 E3. Satoru Iwata revealed a prototype of the controller at the September 2005 Tokyo Game Show. At E3 2006, the console won the first of several awards. By December 8, 2006, it had completed its launch in four key markets. During the week of September 12, 2007, the Financial Times declared that the Wii was the current sales leader of its generation.
Launch
On September 14, 2006, Nintendo announced release information for Japan, North and South America, Australasia (Oceania), Asia and Europe, including dates, prices, and projected unit distribution numbers. It was announced that the majority of the 2006 shipments would be allotted to the Americas, and that 33 titles would be available in the 2006 launch window. The United Kingdom suffered a large shortage of console units as many "high-street" and online stores were unable to fulfill all pre-orders when it was released on December 8, 2006. As of March 2007, some UK stores still had a shortage of consoles, and as of June 2007, demand still outpaced supply in the United States.
Nintendo announced that it would release its console in South Korea at the beginning of 2008.
Features
The Wii Menu operating system interface is designed around the concept of television channels. Separate channels are graphically displayed in a grid and are navigated using the pointer capability of the Wii Remote. It is possible to change the arrangement of the channels by holding down the A and B buttons. There are six primary channels: the Disc Channel, Mii Channel, Photo Channel, Wii Shop Channel, Forecast Channel and News Channel. The latter two were initially unavailable at launch, but activated through firmware updates. Additional channels are available for download from the Wii Shop Channel and also appear with each Virtual Console title. These include the Everybody Votes Channel, Internet Channel and Check Mii Out Channel.
The Wii console is backward compatible with all official Nintendo GameCube software, as well as Nintendo GameCube Memory Cards and controllers. Compatibility with software is achieved with the slot-loading drive's ability to accept Nintendo GameCube Game Discs. The console supports progressive-scan output in 480p-enabled GameCube titles. Peripherals can be connected via a set of four GameCube controller ports and two Memory Card slots concealed by removable flip-open panels. The console therefore retains connectivity with the Game Boy Advance and e-Reader through the Game Boy Advance Cable, which is used in the same manner as it was used with the GameCube. This feature can only be accessed on those select GameCube titles that previously utilized it.
A Wii console running a GameCube disc is restricted to GameCube functionality. As such, a GameCube controller is required to play GameCube titles, as neither the Wii Remote nor the Classic Controller functions in this capacity. A Nintendo GameCube Memory Card is also necessary to save, as the Wii internal flash memory will not save GameCube games.
Backward compatibility is limited in some areas. Online and LAN-enabled features for Nintendo GameCube titles are unavailable on the Wii, as the console lacks serial ports for the Broadband Adapter and Modem Adapter. The console uses a proprietary port for video output and is therefore incompatible with Nintendo GameCube composite video, S-Video and component video cables. The console also lacks the GameCube footprint and high-speed port needed for Game Boy Player support. The Wii was initially compatible with the GameCube Action Replay, which would work with GameCube titles. The firmware update to 3.0 has caused restrictions to this device along with various unlicensed freeloaders, however.
The Wii system supports wireless connectivity with the Nintendo DS without any additional accessories. This connectivity allows the player to use the Nintendo DS microphone and touchscreen as inputs for Wii games. The first example Nintendo has given of a game using Nintendo DS-Wii connectivity is that of Pokémon Battle Revolution. Players with either the Pokémon Diamond or Pearl Nintendo DS games are able to play battles using their Nintendo DS as a controller. It has also been announced that the Nintendo DS will be able to play game demos downloaded from the console, which they would receive from Nintendo, similar to a DS Download Station. The console is also able to expand Nintendo DS games.
The Wii console is able to connect to the Internet through its built-in 802.11b/g Wi-Fi or through a USB-to-Ethernet adapter, with both methods allowing players to access the established Nintendo Wi-Fi Connection service. Wireless encryption by WEP, WPA (TKIP/RC4) and WPA2 (CCMP/AES) are supported. AOSS support was discreetly added in firmware update 3.0. Just as for the Nintendo DS, Nintendo does not charge fees for playing via the service and the 12 digit Friend Code system controls how players connect to one another. Each Wii also has its own unique 16 digit Wii Code for use with Wii's non-game features. This system also implements console-based software including the Wii Message Board.
The service has several features for the console including the Virtual Console, WiiConnect24, Internet Channel, Forecast Channel, Everybody Votes Channel, News Channel and the Check Mii Out Channel. The console can also communicate and connect with other Wii systems through a self-generated wireless LAN, enabling local wireless multiplayer on different television sets. Battalion Wars 2 first demonstrated this feature for non-split screen multiplayer between two or more televisions.
The console features parental controls, which can be used to prohibit younger users from playing games with content considered unsuitable for their age level. When playing a Wii or Virtual Console game is attempted, it reads the content rating encoded in the game data; if this rating is greater than the system's set age level the game will not load without a correct override password. The parental controls can also restrict Internet access, which blocks the Internet Channel and system update features. Since the console is restricted to GameCube functionality when playing Nintendo GameCube Game Discs, GameCube software is unaffected by Wii parental control settings.
European units mainly use the PEGI rating system, whereas North American units use the ESRB rating system. The Wii unit supports the native rating systems of many countries, including CERO in Japan, the USK in Germany, both the PEGI and BBFC in the United Kingdom and the OFLC in Australia and New Zealand.