Hello, In the APK of Papa Pear Saga There is a folder called Models, if you open an .ffm file with a Hex Editor you will find a .png file inside,
but I do not Know how to extract it, and I found that it is an ffmpeg file, which is like a Kind of video software, and I think it is not supported.
In example I put frog.ffm because I am interested in extracting that file, but you can try with another file.