Open Dolphin and navigate to Tools > Install WAD... . Select your .wad file to install it to your virtual NAND.

You can add the folder containing your WADs to Dolphin’s game directory. Once they appear in the list, right-click the WAD and select Install to Menu .

Wii WADs (Where’s All the Data?) are specialized file archives used to install channels, Virtual Console games, WiiWare, and system updates to a Wii's internal memory (NAND). While standard Wii games typically use .iso or .rvz formats, WADs are essential for recreating the full Wii experience on the Dolphin Emulator . How to Install Wii WADs in Dolphin