Heheheheheheheh! Just any random person in Equestria can get called in at a moment's notice! Twilight will need to put Spike in charge of her castle so that he can keep track of who goes in to look at her map while she's away at her school.



That's actually a good idea you have there! The real bulk/lesson about the episode would be in convincing the unwilling hero and solving the "Map Problem" would just be the epilogue we've seen glossed over in narration in the past.



I also like the idea of the Map summoning a Cutie Mark nobody has ever seen and Twilight has to find someone in Ponyville she's never met before and try to explain how the magic map in her crystal treehouse is telling her to tell him/her that they have to up and go to some country they've never been to before and solve a problem she has absolutely no intel on. That scenario can only end well.