I found "script.xar" file in MAJOR Wii: Perfect Closer (Wii)
at first, I thought it was XAR archive format (https://en.wikipedia.org/wiki/Xar_(archiver)) since its file extension is ".xar"
but It seems it isn't because File signature is not "xar!" but "xar".
I checked this thread: viewtopic.php?t=12739 and I could extract several files with 7-Zip by splitting (script.xar also has "BZh9").
But I could't extract all files. how can I extract all archived files from script.xar?