I have Merengue on my second town.
As you might now, I'm making a village made out of villagers that are blue colored, and as you noticed in the topic title, I'm searching for Skye.
So, if anyone is willing to trade her Skye for my Merengue, that would be awesome. I'm also searching for Francine, so I miiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiight trade her for Francine... maybe
Day by day is the safest way, since you can talk normally to the villagers you want to keep, and the ones that you want to leave just talk and say "never mind" or whatever, so they can ping when they see you.
At least, that what I do and has worked for me.