Spitfire, captain of the Wonderbolts, comes to Ponyville in the aftermath of Spike's greed-growth, bringing with her an issue that only the young dragon can help her with. (SpikeXSpitfire ship-fic)
A scroll summons Trixie for a night with the Princess of Equestria. It would help Trixie though, if she knew which of the possible princesses actually sent it.
She's finally found a stallion that is everything she's ever wanted! He understands her competitiveness, needs for speed, and her hatred of boredom. There's just one problem. He could destroy the world.
Celestia likes her routine. Tax reforms, grants, laws and construction projects are all a princess needs to be content. It's just her luck that for Pinkie Pie, "content" is not nearly enough.