This story is a sequel to Tantabus, Mk. II

The new and improved Tantabus has behaved itself thus far, but Luna has delayed telling Celestia about it. Until one night when it jumps into Celestia's dreams to say hi and inadvertently reveals itself. Luna must now introduce Celestia to her little bundle of self-aware psychic dream energy sooner than she imagined.

This story is a sequel to On The Dark Side of the Moon

While Twilight was trapped in her nightmares, the Cutie Mark Crusaders followed the Mane 6 to Canterlot and sneaked into Princess Celestia's chambers. Now they've got some explaining to do...

A follow-on story from On the Dark Side of the Moon, which may be found here:

Most cutie mark stories are happy, exciting tales of finding one's special talent. But not Mac's story. And after Apple Bloom gets into a fight at school, Big Macintosh decides it's time he told her his own cutie mark tale.

Caution: Feels inside.

Spanish Translation: https://www.deviantart.com/spaniard-kiwi/art/La-manzana-en-su-flanco-1022796216

After a long day of flight practice with Scootaloo, Rainbow Dash discovers the filly knows next to nothing about preening and takes it upon herself to teach her.

Warning: May Contain Feels and/or D'aww moments.

Featured on FIMFiction on 7/20/2013. Yay!
Featured on EQDaily on 09/12/2013 Double Yay!
Reading by TheLostNarrator (excellent!): Here
Reading by DRWolf: Here
Reading by Joehighlord: Here
Riffed by Draklox: Here
Korean Translation: Here
Spanish Translation: Here
French Translation: Here
Chinese Translation: Here

Twilight finds a new potion that transforms her into a lamia. Not wanting to waste this opportunity for scientific advancement, she invites Fluttershy, animal expert to help her in her new form. Things get a little freaky when Twilight discovers that she has the power to mind control other ponies, things get intimate as Fluttershy and Twilight go on a magical journey filled with wonder and self-discovery.

Oh who am I kidding?

It's a shameless hypnofic that will disgust you if you don't share the fetish and get your rocks off if you do.

Changelings and ponies had always been natural enemies of each other, especially with the crystal ponies when they were around. Why wouldn't they be? Changelings were like parasites, feeding off the love that ponies gave off and driving them to illness.

However, Changelings had begun to decline. What started out with as seven hives have diminished down into three, all of which had gone into hiding so well that most ponies didn't know what changelings even were. Even Celestia had not seen one for quite a while, a long feat for an immortal pony.

Until she found a nymph. A new Changeling Queen.

Unable to find it within herself to abandon the changeling, Celestia ends up taking the nymph back to Canterlot under guise as Twilight Sparkle. The plan was simple; find the hive that Twilight belonged to and return her back to be raised with her race.

Of course, despite everything she learned through her long life, she had forgotten that things were never that simple.

For starters, she did not anticipate herself to grow fond of Twilight as time began to pass, or to beam in happiness when Twilight began to refer to her as mom.

Many Many Thanks to my Pre-Readers: Rewrite and Doctor Disco (Welcome to the Team Doctor!)

Twilight's life is changing very quickly and there is nothing she can do to stop it. Will Princess Celestia still look at her the same way? Will any of her friends? Is the pain worth it if they cannot accept her changes, or is it better to just join the starving?

Twilight's day hasn't gone well. Her night is about to get a WHOLE lot worse. Starting with being banished to the Moon...

After a series of unfortunate events conspire to trap Twilight within her own nightmares, Twilight's friends - along with the with aid of Princess Luna - become Twilight's only hope of rescue. Time and Twilight's fears are already against them, but they must also come to terms with how Twilight got there in the first place...

Luna sends a challenge to the fillies and colts of Ponyville. During Nightmare Night, with the help of Discord’s magic, she turns Ponyville into a hunting ground of monsters, beasts, and foul creatures. Who is the hunted and who is the prey becomes unclear as a small band of friends struggle to make it through the night and accomplish their task.

I've seen this idea done before, but as a fan of Sonic and MLP: FiM, I wanted to give it a go myself.

This, basically, is the story of Sonic Generations, but crossed over with the MLP:FiM universe, with Spike and the Main Six taking the place of Classic Sonic and Classic Tails with other MLP characters also appearing (most aren't listed to prevent spoilers). Except for Green Hill, there will be different areas explored, as well as pony rivals and different era bosses. So while it will have its similarities to the console and 3DS versions of the actual game, it will definitely have its differences too.

Also, in case anyone was wondering, there will NOT be any shipping in this story. At the very least, no crossover shippings. No SonicxRD, TailsxTwilight, TailsxFluttershy, or anything like that. If there is any shipping at all, it will only be between characters from the same universe. And the only humans in this story are Dr. Eggman and the ones that appear in the "Sonic Unleashed" level.

A big thanks goes to bvge on Deviantart for creating the new logo on the cover art. It's a vast improvement over the old cover art.

The TV Tropes page can be found here.

NOTE: Due to the length of many of the chapters in this story, most of them have been broken up into smaller parts of roughly 10,000 words or less to make the story easier to read.