You have the split files, but the USB loader can't find the second part. Fix:
Final recommendation If you control the environment (your own Wii and loaders), prefer single-file images on a filesystem supported by your loader (exFAT/NTFS if supported) for simplicity. Use splitting only when necessary for FAT32 compatibility or legacy interoperability, and then adopt a disciplined workflow: original backups, checksums, consistent naming, and a tested toolchain.
Mastering the is a rite of passage for any Wii modder. While it seems intimidating, remember the golden rules: super smash bros brawl wbfs split
For advanced users, (Wiimms ISO Tools) provides granular control over the splitting process. This command-line tool is particularly useful for batch processing or for users who prefer working from a terminal.
Double-check your folder names. A single missing bracket around the game ID ( [RSBE01] ) or a capitalized WBFS root folder can cause USB loaders to completely miss the files. If you need help setting up your Wii, let me know: What you are using (USBLoaderGX, WiiFlow, etc.)? You have the split files, but the USB
This article dives deep into the concept of the "Super Smash Bros Brawl WBFS split"—explaining what it is, why you need it, and providing a step-by-step guide to playing this classic fighter without crashes or errors.
While the Wii can read NTFS or exFAT drives with specific setups, for Wii homebrew. Mastering the is a rite of passage for any Wii modder
How to Split Super Smash Bros. Brawl WBFS Files for FAT32 USB Drives