You are trying to edit the wrong files. PKHeX is for opening .sav or .dsv files from NDS emulators not the roms. The .dsv save files should be in the battery folder for DeSmuME or you can get the .sav files from it if you export backup memory.
You are trying to edit the wrong files. PKHeX is for opening .sav or .dsv files from NDS emulators not the roms. The .dsv save files should be in the battery folder for DeSmuME or you can get the .sav files from it if you export backup memory.