Talk:Episodes, films, and shorts/@comment-26036369-20150209184651/@comment-10390252-20150213135841

@ Ghost,

"Wouldn't she be able to go back and forth between the two?"

Not necessarily, no. Not if whatever it was that trapped her in Equestria destroyed the means by which she was travelling between worlds (the Rainbow Bridge).

Searching for a way to restore her way home could have become a lifetime pursuit and had, amongst other things, led to the building of a certain Mirror (which goes to a human-occupied universe but not the right one).