Downloading commercial Wii ISOs or WBFS files without owning the original disc is copyright infringement – and it exposes you to malware, bricked consoles, and legal trouble. The good news? There are plenty of 100% legitimate ways to play free games on your Wii today.
While the Wii Shop Channel shut down in 2019, previously purchased content still works. If you bought games before closure, they're in your download history.
Legal if you own the console. Use wii.guide for safe, modern softmod instructions.
You'll have a massive library of legal, free content without risking your console or your conscience.