Got one Wii remote with the Classic Controller working by following a tutorial.
When it connects, there are no blue lights shown.
Works on the ES menu, but I had to map it for Stella, which I run as a stand alone emulator (not Stella-libretro).
Its not for the Wiimote abilities most likely. Its because the Classic controller connects to the Wiimote… and the classic controller is most likely the greatest retro controller available. And you do not need a sensor bar for the Classic.
I would like this too. I have a compatible bluetooth adapter.