There are two versions of the Classic Controller: the original Classic Controller and the Classic Controller Pro.
Nintendo introduced the Classic Controller, which plugs into the Wii Remote via a cord in a similar fashion to the Nunchuk, at E3 2006. Unlike most accessories, the Classic Controller largely usurps the Remote's functionality, with the Remote's buttons duplicated on the Controller.
The Classic Controller is reminiscent of the controller for the Super Nintendo Entertainment System, being the same size and having the A, B, X, Y, L and R buttons and directional pad in the same location. It also contains two analog sticks and two extra shoulder buttons used to replicate additional components found on the Nintendo GameCube controller. The controller is primarily used for Virtual Console titles, with several titles requiring either the Classic or GameCube controller to play, being optimized for the Classic Controller. Several retail Wii titles are also compatible with the controller to allow for a more traditional control scheme.
