I made a video on how to use it with Nintendon't so far. Yeah you'll need the new Smash to get it to start functioning on the Wii U, but thought I'd share my thoughts and way of doing it.
I've got it working finally! I ended up using the Smash Stack that came with the Hackless Project M and was able to get the boot.elf from Hackmii to read! Thank you though! :) I got some luck with it finally haha
EDIT: I solved the problem! I ended up using the Smash Stack that came with the hackless version of Project M (I assume it's Smash Stack at least) and it was able to load it up! Hopefully this will help anyone who was in the same boat as I was! Ps, get Project M here if you're interested...