Not all save files are created equal. If you Google "Project X Zone 2 save file," you will find forums with hundreds of links. Here is what separates a quality save from a broken one:
Project X Zone 2 occupies a quirky niche: a crossover SRPG whose very save files are small artifacts of a larger cultural mash-up. The save file—more than just binary data—functions as a condensed autobiography of play: choices made, battles won and lost, and the specific sequence of encounters that shaped a player's tactical identity. Examining that save file opens multiple avenues for reflection: technical, ludic experiential, social, and archival. project x zone 2 save file
If you are playing Project X Zone 2 on the Citra emulator for PC, using a save file is much easier. Not all save files are created equal