When you install a WAD on a homebrew-enabled Wii, it appears as a selectable channel right on your main Wii Menu. Disc-Based Games: ISO and WBFS

Super Mario Galaxy 2 remains the intellectual property of Nintendo. Downloading pre-ripped disc images or copyrighted files from third-party ROM sites constitutes digital piracy, which violates international copyright laws. The Correct Way to Play: Ripping Your Own Copy

This paper has several limitations, including:

If you manage to transfer a fake or corrupted WAD file to a homebrewed Wii console and attempt to install it using a WAM (WAD Manager), you risk "bricking" your system. Installing a corrupted WAD can corrupt the Wii system menu, rendering the console completely permanently unusable. 3. Phishing and Adware Flood