
If you’re looking for a GameCube controller, the best bets are official Nintendo options.

It can be had on eBay for $35 including free shipping from Hong Kong, or on Amazon via various third party sellers for $48. A switch on the back toggles the twin USB plugs between PC and Wii U modes. Mayflash sells a GameCube Controller Adapter with basically identical functionality and a slightly different shape. Four GameCube controller ports on the front let you use either cabled or WaveBird controllers of your choice. It looks a lot like Nintendo’s official adapter, but due to the scarcity of Nintendo’s version and price gouging, Kelux’s adapter sells for a much lower street price. The Kelux GameCube Controller Adapter for Wii U ($30 + $7 shipping) has proved extremely popular recently thanks to its availability.
