This is an SNES to Wii adapter. 

Add a SNES port to your Wii! Use your own SNES controller to play Virtual Console games the way it was originally designed. Authentic gameplay unmatched with other controllers. Get 2 or more RetroPorts to play multiplayer games with friends.

Authenticity of original controllers with the simplicity of Wii
Plugs directly into the GameCube ports
No drivers to install or update
Use with any Virtual Console or GameCube game
Also works on Nintendo GameCube systems

Shipments to Italy, Spain, Brazil and Mexico require priority or express mail international shipping.