atomsk2113

Problems- The portal has a time limit. So if sunset pony were to find and subsequently toss sunset human through the portal, it would have had to happen in just a few days. Also, the mirror was in the canterlot castle. Sunset pony bypassed two guards to get to it. Extra protection would have been given after such an event. But even if sunset pony found, subdued and tossed sunset human through the portal within three days AND protection of the mirror somehow decreased so that, upon arrival, sunset human was not seen and mistaken for sunset pony... Somepony would have noticed a confused and recently banished sunset shimmer wandering around all scared. It is, scarily enough, more likely that sunset pony... made sunset human... disappear. But I think the best theory is that sunset human was either somewhere else in the world or she never came into existence in the first place. Alternate reality where alternate decisions are made. In fact, having all those human counterparts in CHS is the most improbable aspect of Equestria Girls. But the real answer to questions like these will always be - it's just a show, I should really just relax. For mystery science theater 3000.