I just saw today that Agnes moved in and I'm really confused. I have the campground and didn't invite her to move in, so why is she here? I also haven't had anyone come to my campground in awhile, has anyone else had this happen to them?
If you have less than nine villagers, a random villager will automatically move in. If you had nine then you probably picked her up from someone during wifi or through streetpass. When a villager moves out, they are placed in a "void" and the next time you interact with a player through wifi or streetpass who has less than ten villagers, the "voided" villager will arrive in their town.