: A NAND backup from one Wii will not work on another because it is encrypted with unique hardware keys. Downloading a NAND backup from the internet is generally useless and often illegal.
The most important thing to understand is that Every Wii console has unique hardware encryption keys stored in its bootloader (specifically the "boot1" and "boot2" areas). Wii Nand Backup Download
Searching for a is strongly discouraged. Using a downloaded backup from another user is technically flawed due to encryption mismatches and poses a high risk of permanently bricking the console. : A NAND backup from one Wii will