ZUN autosave file! (TH15 LoLK 東方紺珠伝)
Location of TH15 autosave file:
%appdata%\ShanghaiAlice\th15\autosave
You MUST generate the autosave file first, delete the file and then wait for the built-in replay file (Demo Gameplay) to play, only then the ZUN autosave file will be generated. It depends on luck anyway, if you choose Marisa (like in this video) but the Demo Gameplay is Reimu one, it will not work, you will need to wait again and see if it will play the Marisa's Demo Gameplay.
Hope you guys will enjoy. :)