Many ponies and other creatures of Equestria know of the legend of Megan Williams. She was a proud human girl who explored Equestria when it was called Ponyland. But, the rainbow bridge connecting her world to the pony world was shut down for two thousand years, which is two years in her time. But, when the bridge was re-established, Twilight took an opportunity to cross the bridge, and bring Megan to Equestria to show her around.