I believe it is. It worked for me in prior games. All you have to do is save the Pokémon’s file onto your laptop and then drag it into your backup of whatever game you want to transfer it to.I have a question about PKHex.
I have savefiles of both games. Is it possible to use PKHex to be take pokemon that are exclusive to Eeevee version and transfer/copy them into Pikachu version or vise versa?