ASH Extractor will usually crash when attempting to extract mii.arc.ash, but can sometimes extract it successfully. I haven't tested rodata.arc.ash yet but I imagine it will be the same thing. edit: Possibly a heap corruption in ASH Extractor, but we could try requesting the source code from crediar so we can fix it. Looks like someone has asked before ( https://wiibrew.org/wiki/User_talk:Crediar ) so might ask that person too the file extracted from mii.arc.ash appears to be a Wii U8 file, but attempting to use ARCTool.py or whatever misc tools fail to extract it due to large file sizes being detected. Maybe because of the endianness needing to be swapped.