One sunny day in Equestria,Twilight decides to visit the castle where she found the Elements Of Harmony and defeated Nightmare Moon,but someponys stop her from going alone. Pinkie Pie,Fluttershy,Rarity,Applejack and Rainbow Dash all decide to try and go with Twilight.
So everypony meets at Fluttershy house and suddenly Fluttershy says "I wonder if we will see the manticore again."
After a couple of hours of walking the ponies decide to rest under some trees near the bridge where Rainbow Dash was asked to join The Shadow Bolts. Then as the ponies got closer to the castle they saw it had been fixed as when Nightmare Moon came to the castle it was in ruins.
Twilight was puzzled and thought who had done it and thought Princess Celestia could have fixed the place by magic. Spike offered to send a letter to Celestia and ask if she knew anything about how and why the castle had been repaired. Suddenly Rarity's horn lit up like it does when she finds jewels and noticed there was hundreds of gems lying around the base of the castle.
Later that evening
As Rarity was finishing a dress,Photo Finish came into Carousel Boutique and asked Rarity if the dress she was finishing could be modeled. Of course Rarity said yes and from then on Carousel Boutique became famous for jewel encrusted dresses,and Rarity was famous for designing,making,creating and modeling those dresses