@godreborn Note: I didn't say Bloopair works on vWii but I said Nintendont supports 3rd party bluetooth controllers. So yea, Bloopair will shutdown when the console reboots to vWii but Nintendont should be able to pick the controller up again on its own from within vWii. For me it looks as all that's missing for that magic to work is a correct contoller.ini for Nintendont (cause as you say: Nintendont is not Bloopair, so both need their own contoller configs).
//EDIT:
@Super_K What's the exact controller you want to use with Nintendont?
//EDIT²: To explain this some more: Think about a PC dual booting to either Windows or Linux. Now you want to use a bluetooth controller on that PC: Windows supporting the controller won't make it work on Linux and vice versa but when both operating systems have a driver the controller should work all the time, right?
Now translate the same to the problem at hand: CafeOS is Windows and vWii is Linux. CafeOS got a driver with bloopair, vWii from Nintendont. So the controller should work all the time, right? The only reason it doesn't is that Nintendont is missing the drivers configuration.
//EDIT³: Also
@Super_K Disable Wii U gamepad (DRC) support at Nintendont as both, DRC and your bluetooth controller, might be registered to the same slot but the DRC always wins in that case (which means the bluetooth controller gets ignored even if supported... A really stupid design issue of Nintendont but oh well).