PkHex trouble

[RobWavePKMaster]

I'm just trying to add some mystery gift items to my old gen 3 cartridges. I have the .sav files downloaded but pkhex won't let me access the files. It just keeps saying that they are unsupported files can someone please help.

[Kaphotics]

Check if they are indeed valid backups of your save file, and of the standard format that isn't compressed in any way.

Try checking other save editors like A-Save; if it doesn't work in multiple editors, then it's likely your save file being bad.

[RobWavePKMaster]

How do I access the save editor?

[Kaphotics]

A-Save is a separate program you can download.

Without seeing your save file (via upload), can't know for sure. Again, if multiple editors reject it, then it likely isn't a valid dump.