If you obtained the .wbfs file from an unofficial source, it is malware-free, uncorrupted, or complete. The only safe and legal way to obtain a proper WBFS is to dump your own retail NTSC disc.
As always, each of the game's characters is an individual, and should they fall in battle, they're gone forever, complicated back- Fire Emblem: Radiant Dawn Review for Wii - GameFAQs Fire Emblem- Radiant Dawn - -wbfs- -NTSC-