I've now installed HBC on my Wii U using Smash Stack, so I'm on Nintendont version 3.344 (last version by now) on a PAL Wii U vWii.
I tried playing Super Smash Bros. Melee with GC controller and it worked just perfectly, it looks really great via HDMI and I like how it still renders in 4/3 even on the Gamepad screen (I don't use widescreen patch for reasons). Really good job to the devs.
I only have two little issues which I hadn't on regular PAL Wii (using the same Nintendont version) : I can't quit the game to get back on the HBC launcher screen. I tried the GC button combination of R + Z + B + Down on D-Pad, the Home button on the Wiimote and they don't work at all. The reset function with R + Z + Start still works though.
It's quite annoying not to be able to turn off a game without turning the console off, and talking about that here's the other problem : I can't turn the power off with the Wiimote, and using the Power button on the Wii U causes it to reboot instead of turning off like it should.
Are those issues known and normal? If they do, would it be possible to correct them so they work just like they do on regular Wii?
Many thanks!