The game does not work on virtual machines like BlueStacks and Nox, having a measure to prevent starting on them, thus not downloading the files. It only works on real devices. Most versions of the APK itself has few graphics inside. That's why I'd like at least a copy of its installed files (or at least the "assets" folder). While already removed from shops, its apk can still be installed this month, and if it's an old apk it can still be updated with QooApp after installing.
I hope that this final batch will have most graphics, known exceptions being:
* Graphics related to previous events, as they are likely overwritten to save space.
* Most cards, as they are uploaded when seen, but most (and their thumbs) are available on
https://nsc-db.github.io/jp/index.html, although it is lacking materials, like
https://gsnarutodash.narucole.jp/img/res...000232.png. The official site has most thumbs as they were used on some event pages, but those are also missing some (like "thumb_20040524"), has a few different (most neglectable, the biggest being "thumb_20050802", which has a different type and rarity), and some unused that I don't know if are in the game files ("thumb_50070501", used is "thumb_50070501_7").
* Edit: Considering that loadings take longer when using characters that were never used before (there are plenty), character sprites also require to be loaded... The apk only has a few, which are also used on a loading screen: /assets/image_(s/m/x)/obj/