I just downloaded new Pokemon Platinum rom, started to play, made my first save and then tried to open this save in Pokehex. And that's what I see. The file couldn't have been damaged in the five minutes that I played it. Phex has also just been downloaded. This error usually comes out if you edit GBA roms and then try to open a Desmume rom. In this case, you have to delete all the old roms and download new ones, but this time they were new. I do not know what to do with this stupid shit.