Raw Wii discs (.ISO format) are exactly 4.37 GB, regardless of how much data the game actually uses. A .wbfs file strips out the "garbage data" padding used by Nintendo to fill physical discs.
The ID can be broken down:
between the NTSC-U (North America) and NTSC-J (Japan) versions of the game How can I help you get your game running ? Share public link rhythm heaven fever wbfs some01 ntsc wiigm
Which follow-up would you like?
While direct download links for copyrighted ROMs cannot be provided here, users typically find these files on archival sites or community forums: Internet Archive (Archive.org) : Often hosts complete "Wii NTSC-U" collections in Vimm's Lair Raw Wii discs (