The Nunchuk is the first controller attachment Nintendo revealed for the Wii Remote at the 2005 Tokyo Game Show. It connects to the Wii Remote via a long cord, and its appearance while attached resembles the nunchaku, hence its name. It features a control stick similar to the one found on the Nintendo GameCube controller and two trigger buttons (a last minute modification changed the two triggers to one trigger and a "C" button, as described below). It works in tandem with the main controller in many games. Like the Wii Remote, the Nunchuk also provides an accelerometer for three-axis motion sensing and tilting, but without a speaker, a rumble function, or a pointer function.
When it is connected to a Wii Remote, it provides another controller method for Super Smash Bros. Brawl, officially referred to as "Wii Remote + Nunchuk", though often shortened to "Wiichuk". The Wiichuk is also compatible with Super Smash Bros. for Wii U when connected to the Wii Remote or Wii Remote Plus.
Control Scheme of Wii Remote and Nunchuk