I did this is the most complicated and expensive way possible. I came here to show it off : r/Gamecube
Elgato Game Capture HD - Supported Game Consoles – Elgato
Amazon.com: Elgato HD60 S, External Capture Card, Stream and Record in 1080p60 with ultra-low latency on PS5, PS4/Pro, Xbox Series X/S, Xbox One X/S, in OBS, Twitch, YouTube, works with PC/Mac :
Y Team Controller Adapter for Gamecube, Compatible with Nintendo Switch, Super Smash Bros Switch Gamecube Adapter for WII U/PC with 4 Port
Elgato Game Capture HD60 Xbox One/Playstation 4 PS4 PC/Mac USB HDMI Recorder for sale online | eBay
Amazon.com: Elgato Game Capture HD - Xbox and PlayStation High Definition Game Recorder for Mac and PC, Full HD 1080p : Electronics
Pokemon Colosseum for Nintendo GameCube iuu.org.tr