Download wbfs_file.exe (Windows) or compile for Linux/macOS. Then run:

Users frequently search for:

wit copy your_brawl.iso /path/to/usb/drive/ --wbfs --split

When the Wii loader reads these files, it treats them as a single continuous disc, allowing the game to run perfectly without a 128-bit NTFS or WBFS-formatted partition. Top Tools for Splitting Brawl