how did rouge get the white stripe? did it come with her powers? or..

Comic and cartoon wise she always had it. But movie wise she got it 由 absorbing to much of magneto's powers.

the magnet grandpa caused it.check the 1st movie

It is a result of her mutation.. but the movie changed it =/

go to the first movie they have to save rogue from magneto and they throw wolverine and whil shes in the machine she gets it right before wolverine saves her