8BitDo will be releasing a brand new wireless GameCube controller adapter for your Nintendo Switch. The adapter is priced at $19.99, and it will release on December 7th, the same day as Super Smash Bros. Ultimate. The adapter works with Wired GameCube & Classic Edition Controllers. According to the Verge, the adapter also has “30 hours of battery life, and it also has both a Switch home and screenshot button”. If you want to get the adapter for yourself, you can get it from Amazon right here.
Thanks to Koshua5 for the tip!