A:AnswerYes, the old game cube controllers work on this adapter, and the new GameCube controllers made are basically the same thing, so all GameCube controllers will work on this adapter :)
A:AnswerYou don't need a Gamecube controller adapter for the original Wii as it has 4 slots already built into the Wii system for Gamecube controllers.
A:AnswerThe length of the cables is probably around 36 inches. The black USB cord is used to operate the controllers when plugged into the adapter. The white one is used to enable the rumble feedback on the controllers. I hope this helps.
A:AnswerThis one is made by Nintendo and Nintendo only made compatible with their Nintendo consoles that have a USB-A port like the Nintendo Switch, Wii, and Wii U.
A:AnswerI have not tried this but I am assuming that you can plug-in your Gamecube Wavebird wireless receiver into the adapter and work just as well as a wired original Gamecube controller.