i got save profiler installed

, do u know any pkhex guides to use with gateway?
You select Pokemon on Gateway rom selection menu and open SaveDatafiler. Then you can export your save (user data) to the SD card.
Turn the power off and plug the SD card into the PC's card reader and check the 'filer' folder.
The exported save data is there. Pokemon's save file is called 'main'. You can open that file in PKHeX (make a backup first).
You can then put the modified file back there, replacing the original 'main' amd put it into the 3Ds again.
Load Pokemon on Gateway menu, open SavaDataFiler, select the backup folder (3rd tab) and import it back into the CTR cart.