On the eve of Hearth's Warming Eve, as Luna raises the moon, she is visited once again by the very entity which drove her to madness. Resisting it's influence, Celestia and Luna hatch a plan to end this once and for all.
One which works too well with unforeseen consequences.
As the nightmare loses it's power, it plummets to the earth followed by an explosion of Power that the Royal Sisters know too well. However when they find the epicentre of the explosion they are shocked to see an Alicorn with no memory, and no name.

Yet the question remains. Why does it resemble Luna so much that they could be twins??

Follow the story as this unnamed Alicorn makes her presence into Equestria, for better or worse.

Deep in the Royal Canterlot Archives lies a book that hasn't seen the light of day for longer than any pony could remember. Its uncovering reveals powerful magic as old as the Princesses, and tells stories of heroes and villains long dead. Twilight will find that this book is much more than just an ark of ancient magic, it was meant to be found...

PiT may be back in business. Don't hurt me please.

Tal is an abnormal teenage boy, and he spends his days watching My Little Pony and researching everything science-y. When he discovers how to make a portal to different dimensions controlled by his computer, the possibilities are endless! But when a couple of friends come along for the ride, can he keep it hidden from the press and the brony forums, or will he lose his invention to the government?

This is my first fan-fiction, so any and all suggestions, grammar checks, and anything that bugs you about this story are all taken gladly. Please don't hurt me.

EDIT: Changed both descriptions, not really hidden from family. :/

One day, the Doctor and his new friends the mane 6 will embark on another adventure through time and space, however something in the TARDIS went awry and they entered the dimensional rift and the girls find themselves in a world like no other.. a world the Doctor thought he would never see again.