No official undub exists for the NTSC .wbfs. The Japanese voices are tied to the NTSC-J build. You would need a patched ISO, which is a separate project not covered by a clean .wbfs search.
You lead a group of inexperienced rebels in Daein, struggling against an oppressive occupation force. Fire Emblem- Radiant Dawn - -wbfs- -NTSC-
Unlike ISO files, WBFS files are optimized for the Wii’s file system, leading to faster load times and fewer crashes during those grueling 2-hour-long chapters. The NTSC Advantage No official undub exists for the NTSC
Since you specifically mentioned , here is the technical breakdown of what that entails for this title: Fire Emblem- Radiant Dawn - -wbfs- -NTSC-