Load a BD2GAME0.sav, BD2GAME1.sav, or BD2GAME2.sav:
(You need a 3DS with homebrew and/or CFW to extract saves for this. If that doesn't make sense to you, google it or something. Citra saves also work.)
This part just shows information about the loaded save to help convince you that it works.
If this data looks wrong, then there's something different about your save and it might not work if you edit it. (It might, though; you're welcome to try)
If you report issues, PLEASE UPLOAD YOUR SAVE or I will not help you.
source to this thing is on the git's hub: Soaprman/SavelySecond
feel free to modify it and rehost it to your fart's content