I got the newest RiiVolution for wii U's vWii but it freezes at the strap screen. I tried gecko for wii and I get to the menu but I can't select anything cuz my wii mote loses connection with the wii u. What do I do? Where can I find Gecko OS for wii U or a riivolution that works? Please respond.
I don't think Riivo will work; I remember an update on the Wii(I think it was 4.2) that disables the ability to properly use Riivo.
Also, the reason your Wiimote isn't working is because you have one of the newer Wii remotes with Motion Plus built in which isn't compatible with Gecko and most older HBC stuff.
To get Brawl mods of any kind working on the Wii U, you NEED an older Wii remote without motion plus built in.