I saw a video and was looking into this one instead.

https://www.amazon.com/Hyperkin-Controller-Adapter-GameCube-nintendo-u/dp/B013XAVPFW/ref=sr_1_3?crid=7LC5U00EQ8XV&keywords=Hyperkin+4-Port+Controller+Adapter+for+GameCube&qid=1682208559&sprefix=hyperkin+4-port+controller+adapter+for+gamecube%2Caps%2C107&sr=8-3

IMO, the price for the official is too much, and I was looking into getting these controllers.

https://www.amazon.com/Gamecube-Controller-Controllers-Nintendo-Compatible/dp/B07BS5TXBF/ref=sr\_1\_4?crid=2UFM3GENJAGJG&keywords=gamecube%2Bcontroller&qid=1682208401&sprefix=%2Caps%2C210&sr=8-4&th=1

Thanks.