"Well Sunflower, I suppose I'll be seeing you, if not face-to-face, then at least in the history books." The Doctor said, walking with Pinkie and their newfound friend.
"Do I become famous?"
"Don't know, I wasn't in the 'present' for very long. Pinkie, have you heard of her?"
"mmm... kinda, my friend found your book in a library!"
"My what?"
"Well, time to go!" The Doctor quickly lifted Pinkie onto his back and stormed off. "Sunflower, it was great meeting you, thanks for helping out!"
"You know, where you put your spell for cloudwalking and making wings!"
"Darn it Pinkie!" The Doctor hissed. He looked over the area for large burning holes or cracks in the sky with demons pouring out of them. Upon satisfying that there weren't these things nearby he breathed out; "Oh good, the paradox wasn't that big." He turned to Pinkie. "And which is why we aren't going to be telling anypony else- anyone, anyone else, spoilers."
"Fine. Sorry. Bye Sunflower!" And the two turned a corner heading for the Tardis, and hopefully keeping Pinkie from spoiling anything else.
"Bye Pinkie, bye Doctor!" She waved her hoof even though they could no longer see her. She turned toward the sun, which she will never look at the same again. She smiled. "Wings, eh?" She galloped toward her workshop and swung open the door, and she began sketching different designs for wings in a journal she had lying around, she flipped it open to her cloud-walking spell, and then began putting together a very complex spell, etching the directions as they came to her. After about two hours she looked upon her final result."Gossamer and morning dew... nah, too weak, I'll move to a different page."
"So, after that little adventure, what do you have planned next?" The Doctor said to Pinkie jovially.
"hmm... I picked the last one, so you should pick this one!"
"Well I don't know Equestrian history, and right now, I don't feel like doing book-learning on the Tardis's tiny amount of info on this world." He brought up the monitor, and looked at the compounded info gathered from computers in future Equestria. "That's... strange."
"What?"
"Apparently... from your time period actually, Equestria as a country is really, really old."
"Around fifty-thousand years, right?"
"Then why is the level of technology so simple? You had trains and airships for apparently centuries, but never thought it would be easier to write on a computer, or easier to talk on a viewing screen rather than by letter?"
"We have magic for all of that." Pinkie said happily. "I've talked to my parents from miles away by crystal communication before."
"Crystal- what?"
"There are little offices all over the place where a unicorn will make a magical link between two crystals, and instead of your own reflection on it you see the person you're talking to! But it's really expensive."
"I still think magic is a poor substitute for technology." The Doctor pulling out his Sonic Screwdriver affectionately.
"But back to what you were saying earlier, Equestria is fifty thousand years old, so what?"
"But it's practically impossible for a country to survive that long!" He thought to himself; most civilizations don't last that long.
"Well most of the countries in the world are really old." Pinkie paused to consider this. "Let's go see Hearth's Warming Eve!"
"Hearth's Warming?"
"Yeah, it's the time of year where we celebrate the forming of Equestria and harmony!" She took in a deep breath, which the Doctor somehow felt was going to be the beginning of a spiel he would not survive. "A long-long-long time ago all the ponies were living separately, and it was really sad, but then-"
"You know what, let's just see it for ourselves, and no spoilers." The Doctor said, hopefully saving himself.
"Hehe... Alright, but dress warm!" She blinked twice. "Doctor... your wings..."
"Yeah?" He turned around and saw them reappearing without his consent. "That's weird."
"How does that even work?"
"Not sure, I think it has something to do with my Time Lord abilities reacting with my new 'natural magic' as a pony." He tested out the wings a little bit. "I don't know why they appeared now though. An early-warning system maybe? When I'm in danger the wings appear to help me, when i'm not they disappear." He flapped them a few times and rose from the ground, then set himself back down. "But then again, who knows? It might be random, or controlled by some other impulse."
"Huh. Well come on! I want to see the first Hearth's Warming!"
"Alright then, let's see, let's see... Alright, I think this would be a good starting point." He smiled, checked the monitor, and frowned for a second before returning to his smile. "Pinkie, be sure to dress warm!"