Hi guyz, it's me again, and I still have a few questions to enhance this "guide". Hope you can answer
1) I saw some game packs available to download by torrent, containing WiiWare titles and Wii Virtual Console titles.
All the files inside are ".wad" files. Can we safely use them all on vWii? Or can some of them brick the vWii, or not work without some weird cIOS? Also, are they all playable with a wiimote or do they need extra hardware? More generally, which ".wad" files do we have to avoid on vWii, and how can we know which cIOS dependencies a wad file has before installing it on vWii?
Wad files are only containers (like zip file) and contains the game to be installed to the system menu.
The channels are not using cIOS, but official IOS. The vWii IOS should all be compatible with all existing games.
The hardware is the same as the one needed to play that game on Wii. If the game is meant to be played with wiimote, you will need a wiimote. If it's meant to be played with balance board, you'll need one, etc.
The risk is the same on Wii and vWii : if the banner animation of the channel is bad, it will brick the console. The recommendation are the same :
1. Be careful where you get your games, it could be bad on purpose. Wrong game, wrong banner, etc.
2. try the banner first (sneek is a good way to test if the system menu can load the channel's banner animation without risking a brick).
3. Installing Wad file is always a risk. Depending on the program you use to unpack and install the wad, or the wad files themselves which are altered to be "free for everyone", you might end with bad files installed on your console.
4. it's recommended to use EmuNAND instead or installing Wads to NAND to prevent brick and filling the limited free blocs.
The issue with vWii is that there's no brick recovery solution. No priiloader or bootmii. Do one wrong step and it's bad.
2) Nintendont allows playing Gamecube backups on vWii through any USB loader, right? But which hardware do we need exactly to play them? Is a gamecube controller + a wiiu gamecube adapter okay? Is any USB controller + any generic wiiu/gc adapter okay?
Look in the first post of nintendont thread. Everything is explained, detailed, FAQ'd and troubleshot.
But to answer you : the Gamecube controller adapter works.
A Lot of other USB controllers or adapters are working, it depends if they are HID compatible or not.
Edit:
And I saw you asked in another thread what emuNAND was.
I wrote this "quick guide" to explain what it is.
https://gbatemp.net/threads/usb-loader-gx.149922/page-988#post-5474866
it's only a method to launch games installed on external device like if they were installed on the console. (like using USB for Wii games, except it's for channels)
the game is launched directly from SD or USB, so it prevent installing WAD to Wii or vWii, it prevent bricking if the wad banner is wrong.