The HORI Battle Pad for Wii U (also compatible with original Wii). Usually around full retail of US$24.99.
It's a Classic Controller Pro (plugs into a Wii remote) that looks like a GameCube controller.
The benefit is you don't need the GameCube adapter and it works with most games.
The only drawback is you require a Wii remote to plug it into.
Officially licensed by Nintendo, this control pad is similar to shape and function of the original Nintendo GameCube controller.
Simply plug into your Wii U Remote and enjoy! Features short stroke L and R buttons, 3 Turbo settings, and a large D-pad.
This controller can be used for Classic Controller, Classic Controller Pro supported games and most Nintendo Virtual Console Games.
Wii U Remote not included.
Mario version ~ AU$33 delivered
Luigi version ~ AU$34 delivered
1 Mario version + 1 Luigi version ~ AU$61 delivered
$15US = $30AUD? Ouch. Is our aussie dollar really that bad?