Brought to Equestria to defend it against the coming of the alien scourge, our hero must avoid Celestia's gaze while pursuing her own investigation into the alien's activities.
Through some unknown means, Luna has been given the chance to stop her and her sister from making the biggest mistakes of their lives. Though it may cost her more than she realizes.
In the red/blue version of pokemon it says this about haunter: "Haunter can pass through solid walls. It is because of this that it is believed it is from another dimension." A fact I can confirm for you, personally.
Rarity has fallen on hard times, and now finds herself a correspondent for a shady newspaper. Worse still, she has to lower herself to 'reviewing' a freak show. Though perhaps this is the start of something amazing.