Shank Mods – a combination of a WaveBird and 3D-printed parts – is the real deal.
Over the weekend, the creator uploaded a video detailing the fruits of their several-months-long labor.

The controller uses a WaveBird shell split right down the middle, 3D-printed parts to keep the Joy-Con board and slider rails in place, a custom-carved secondary Z button, four GameCube controller Start buttons to act as stand-ins for the Switch's plus, minus, Home, and Capture buttons, Wii U stick boxes to enable the analog sticks to "click in" and maintain compatibility, and a fresh coat of indigo paint.
If that sounds like a scary amount of work, well, that's just the gist. Think of the soldering!
The GameCube Joy-Con project wasn't a solo endeavor, either – Shank teamed up with other creators like Madmorda and Bassline to reach the finish line. To see the final result, jump to 11:29 in the video.
This probably goes without saying given the creation process, but the bespoke controller isn't for sale. The GameCube Joy-Con were expensive, time-consuming, and "a pain to make," according to Shank.
"I will not be making another set."

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