I already clicked your eggs, Royal, but did you click mine? Gigantic sig, by the way XD
For Feign, Mike says:
You can just give the King's Rock to Slowpoke without having to trade it or anything, and when you use the item would be your call, such as I did with the moon/thunder stones on my Pokemon. If you want it to be a Slowbro though, all you'd have to do would get the OK from Mike sometime for Slowpoke to evolve. Basically it's your choice :)