That's easy. Ok, so in the time finder just go to the 4th/5th gen shiny egg finder. Change the method to BW/BW international and choose the everstone nature. Don't check the Ditto Parent box (Even if you are using one) or the DW egg box, only check the inheritance box. Then enter the parent IVs. For nature/ability/gender leave them all at any. Oh, and don't forget the month/year thing. Then enter the target IVs. For min/max frame, make the min 60 and the max like 20000 so you find a lot of seeds. For ID/SID you can enter yours or any random combo.