I would really like to see Sunset go on a Pokemon Journey. Maybe even in the place of Ash, because her being a noob a battling would actually make sense. Please someone make it happen.

Isn't Ash like, twelve years old or something?

considering the probable ages of the mane six in pony equestria, and that Sunset Shimmer is likely older then all/most of them, and then in the mirror world ends up in high school its not like she hasn't been in that sort of situation before...