are data containers used primarily for Wii channels and Virtual Console games. Super Mario Galaxy 2 was never released as a Wii Channel or Virtual Console title that would come in a standard ".wad" format. The full game was released only as a Wii optical disc (ISO) or as a digital download on the Wii U eShop (in a different encrypted format).

I understand you're looking for information about Super Mario Galaxy 2 and WAD files, but I need to provide an important clarification before proceeding.

Would you like a detailed guide on ripping your own Super Mario Galaxy 2 disc for use with Dolphin or a USB loader instead?