About This File
Many people are playing custom Virtual Console versions of Pokemon Gold, Silver and Crystal. The saves of these games cannot be easily edited with PKHeX though, since PKHeX expects a different file size for Gen II saves. Direct support for these kind of files will surely be added by Kaphotics someday but in the meantime, you can use this converter right here to easily modify the size of your save file so that it can be used with PKHeX. It also works the other way around of course so that you can actually use your edited save files in your Virtual Console games.
The usage is really simple: Just export your sav.dat file from the Virtual Console game using any available method, then drag the file onto sav_converter.exe. This will add a couple of additional bytes to end of the save file, afterwards you can just open it with PKHeX like you normally would. After you've finished your work with PKHeX, drag the sav.dat file onto the converter executable again to remove the additional bytes that were added before. Then you can simply import the file back into your game using any of the methods available for your specific 3DS setup.
Due to the nature of the tool, I can't provide any screenshots, since there's just nothing to show, the program does not have a GUI.
If you have any questions, just send me a PM