I have a DecryptedRomFS.bin of Bravely Second. I extracted its files through HackingToolKit3DS. I ran the crowd.fs files through QuickBMS, and it spat out files in the format of .BCRES and .BCSKLA. I have no idea how to extract or convert these. I can provide an example archive if necessary.
Edit: Here's an archive: https://www.dropbox.com/sh/qzn5c00c7na07...vGLAa?dl=0
Edit: Here's an archive: https://www.dropbox.com/sh/qzn5c00c7na07...vGLAa?dl=0