OliTc

Now, it works perfect! Thanks a lot! Sooner or later, I am sure you will find out the way to inject the re-save files ingame!

So how should I fully decrypt the save file in order to get it completely opened in the new version of PKHeX then? I am following the guide that SciresM posted to completely decrypt Save1, but it just worked for me with the previous version of PKHeX, because with the new one I get the "hash verification failed" message, plus I can't re-save and export the file. Thanks in advance for your help.

So is there a way to overwite rightly decrypted data in order to re-save the file on PKHeX?

I still don't get it. In the previous version of PKHeX, once I got the keystream through XORpad I was able to fully drecrypt the saves brute forcing them, obtaining the Save1key, which allowed me to completely decrypts all of save1. Now it seems like is not fully decrypted when I try to open it with PKHex... So what has changed? Is there a new procedure to get save1 fully decrypted, or is it just me that I'm not doing it rightly?

I'm sorry, I didn't understand what you mean.

With the new update, I'm not able to edit and export the sav as I did in the previous version.

It perfectly worked for me, thanks for sharing the whole process of decryption (even if it's not working anymore). However, how did you manage to inject back the edited sav through powersave to the cartridge?