The latest 4.0 firmware update for the Nintendo Switch hid some secret updates, including adding support for both USB wireless headsets and the GameCube controller. Or rather, the Wii U GameCube controller adapter. The hidden feature was a surprise and delight to Nintendo fans, but also a surprise for Nintendo themselves.
In an interview with Kotaku, Nintendo of America President Reggie Fils-Aime revealed that the firmware update allowing the use of the GameCube controller wasn't something the company saw coming.
"In our latest system software update, it enables third-party peripherals to work on Nintendo Switch," said Fils-Aime. "As a result, the peripheral for Wii U that allows it to attach GameCube controllers also works."
However, Fils-Aime denied this was in preparation for a yet-unannounced Super Smash Bros. game for Nintendo Switch. "Of course, there's nothing to announce on this. I think it's fair to say, Stephen [Totilo], that that peripheral working was as much a surprise to us as it was to consumers."
So while it's unclear if the GameCube peripheral support for the Nintendo Switch is a complete accident or not, Nintendo is chalking this one up as a pleasant surprise.