This is an idea that wouldn't leave my head, inspired by Fairy Slayer's "Mommy Nearest," Aldea Donder's "Alicorn," SoundofRainfall's "Play" and RainbowDoubleDash's "Lunaverse"

Alternate Universe: Instead of Twilight Sparkle, Princess Celestia made Rainbow Dash her personal student instead! Follow her through the events of the 1,000th Summer Sun Celebration. A reimagining of "Friendship is Magic"

This story is a sequel to Hot Heads, Cold Hearts and Nerves of Steel

DASHVERSE: (Takes place several months after the events of http://www.fimfiction.net/story/68962/hot-heads-cold-hearts-and-nerves-of-steel)

Rainbow Dash and her friends are off to Canterlot to help in the preparations for the wedding of Princess Cadance and Shining Armor! But once she arrives, Rainbow learns of a sinister plot against Equestria. What's worse, she can't even rely on her friends to help her because one of them is not who she seems...