On the topic of Vivilion, is it possible that the reference has less to do with player behaviour(though that is a brilliant result), but rather the fact that the beast is implied to be Lucifer, who is said to have many forms?
Regarding the Furisode girls, since I doubt it's ACTUALLY intended to be a robe that kills the wearers, is it possible that the name references the fact that their culture is being absorbed by the culture of Kalos? The kimonos are killing them, in that continuing to wear them is separating them from society(which obviously causes problems), and they know their children will surely start the process of distancing themselves from the traditions. In fact, I'd say it's not the kimonos that are killing them- they are killing the kimonos.
its possible to catch a eevee on route 8
YOLO swag for jesus