It rarely works. The Wii’s USB loader requires raw access to a partition (usually MBR/WBFS). Android does not allow apps to directly expose a partition as a USB mass storage device (since Android 4.0+, it uses MTP). You would need root access and a complex app like DriveDroid . For 99% of users, using a standard USB stick formatted on a PC is still superior.
or manual file management, these are the core functionalities available: Format Support : Manage Wii and GameCube games in formats like Automatic File Splitting : Automatically split larger wii backup manager apk android
: Seamlessly converts between ISO, CISO, and WBFS formats. It rarely works