Just because you havent gotten it to work yet dosent mean it isnt compatable.
When you look at the raw data in HidTest v.6 what does the value in offset 0 do when you dont press anything?
Are their any values that appear to be changing when nothing is pressed?
"Mayflash adapater+Wii U pro controller" in HidTest v6, when you press any button , the values that appear to be changing without stop, it's hard to tell because the numbers flicker on my tv so they're very hard to read. i think: when i press any button, it acts I'm repeatedly tapping it, so the the values that appear to be changing without stop.
but in HidTest v6, i also test the ps3 controller , when i press any button the number on the tv won't flicker without stop, it worked fine.
so it does mean: "Mayflash adapater+Wii U pro controller" is not compatible with Nintendont