Help Please, Trying to restore old backup for Pokemon Moon

(1) You have to get another Pokemon Moon cartridge to retrieve the save the yourself.

-or-

(2) Someone else happens to have both the PowerSaves device and Pokemon Moon cart would require your backed up save file. After restoring the save data to their cart, that person would then have to dump a decrypted version of the save in Checkpoint/JKSM.

There's no other way to recovery the save.

See posts #3 and #5 below.

 

Fairly certain this is not possible. Save data for games built for 2.0.0 fw sdk or higher (or something like that) are encrypted on a per-cartridge basis.

https://www.3dbrew.org/wiki/Savegames#Gamecard_savegame_Encryption

Either way, for Pokémon it has never been possible to restore a powersaves backup to a different cart, unless maybe you were able to decrypt it and re-encrypt it for the new cart, but that would require having access to the original cart, so that's not an option.

 

Edited my previous post for facts correction.

What @Ammako pointed out about the saves being backed up from the PowerSave and that they can't be restored on another cart of the same game is unfortunately true.

• [r/powersaves3ds] Backing Up Save Files

Edit - The second bulletin point #2 might be possible if you still have the original PowerSave that made that save backup. No idea if the any Pokemon Moon cart (of the same region and revision) will do.

 

I have exactly the same issue, my collection have pokémons i grow from GBA and Game Cube version..

Wondering if you find a way to read and copy only the pokémons or boxes files throught pkhex to a new save?

I'm still searchin..