The USB adapter will not work out of the box since it uses XINPUT and not HID. You will need an adapter that converts the XINPUT signal to HID such as the CRONOS adapter. Even then it may not work.
You really shouldn't be using a 16MB MCemu to begin with as the Wii has limited RAM.
I always use the 59 Block individual cards unless a game needs a bigger card.
Thanks! So what is the best option for wireless controllers? Is it the Wii u pro controller? The wavebird is just to hard to come by in my country really.