: Installing poorly made WADs can lead to a "banner brick," where the Wii cannot boot past the health screen. Always keep a NAND backup and use Priiloader for safety.

In the world of Nintendo Wii homebrew, a is essentially a digital package. It acts as an installable archive that contains the game data (ROM), ticket information, and the necessary headers to make the Wii system recognize the software.

Frankly, Dolphin handles ISOs perfectly. But if you must use a WAD:

WAD files act like archive files that contain encrypted game data, metadata, and application files. On a standard Super Mario Galaxy 2 game disc, WADs are often found within a system update partition. These specific files ensure that the console has the necessary components—essentially the Wii's "drivers"—required to run the game correctly. If a user’s system menu is out of date, the WAD files on the disc trigger a mandatory update to ensure compatibility. Applications in the Homebrew Community

Super Mario Galaxy file size is 3.3 GB and Super Mario Galaxy 2 is 2.6 GB.