Radical Red PkHex problem

[notsimro]

I just got PkHex to mess around with so I was going to test it out on radical red so I went to go add in a yamask but realised there is no gen 8 pokemon cause it sees the save file as a gen 3 file not the rom hack so I was wondering if There was a way to get a gen 8 mon into radical red

[Kaphotics]