A: Check your folder naming. It must be wbfs/Game Name [GameID]/GameID.wbfs . Without the square brackets and correct ID, the loader ignores it.
Since you mentioned the format specifically, it is worth noting the technical aspects of this version: wwe 13 wii wbfs
For optimal performance:
The WBFS format was designed to solve a major problem with Wii game backups: wasted space. A: Check your folder naming