In the UK there is no problem - she can move out and live where she likes.
no
It sticks to them.
After you beat Whitney in the Goldenrod City Gym, you can get it from the girl in the flower shop to the right of the gym.
A girl will only move in with your character after they are married. Complete all the marriage requirements and propose with the Blue Feather. After the wedding she will then live in your character's house.
you would have to get parents ok to live with him
the wind makes it move
Adult butterflies can fly, often from flower to flower.
No. You have to be 18 to choose who you want to live with, but by that age, you can live alone, too.
it move in the xylem
Move out with their consent.
In most places she will be considered an adult. She can live where she wants to.