Fakemote.I think you can do it through that IOS that works with PS3 and PS4 controllers
I forgot about that! Modifying a forwarder channel to use a different IOS slot should do the trick!Fakemote.
But i think you'll have to modify the emulator for reload the IOS which is installed Fakemote, or make a forwarder channel for WiiStation which will load the IOS where Fakemote is installed (i haven't tried this last option).