There was a wiisxr version with a sixaxis library. Unfortunately, the link no longer exist, but I'm sure someone has it on their hard drive. Yes, I'm looking at you @Flame
https://github.com/sgibbz/wiisxr-sixaxis/tree/master/Gamecube/gc_input
https://github.com/sgibbz/wiisxr-sixaxis/tree/master/Gamecube/gc_input







