One rainy night in Ponyville, every pony was asleep as well as Twilight and her four friends; Applejack, Pinkie Pie, Fluttershy, and Rarity. Meanwhile in Cloudsdale, every pony was asleep as well.

Except for one particular light blue Pegasus mare. Rainbow Dash. She had been having the worst time of all, having accidently fucked up her friendship with her friends; Twilight, Pinkie Pie, Fluttershy, Rarity, and.. Applejack, whom used to be her best friend who she loved to challenge to the Iron Pony Competitions and Running of the Leaves with. All gone now, as tonight was the day that she lost her. Her last best friend. Her only friend that she knew she could always trust and count on. All gone.

"I'M SUCH A FUCK UP!" Yelled Rainbow Dash, as the poor Pegasus Mare screamed into her pillow inside her cloud house. "I ALWAYS END UP ACCIDENTLY FUCKING UP, AND THEN HAVING TO LOSE ANOTHER BEST FRIEND OF MINE!" Yelled Rainbow Dash, as the poor Pegasus continued to be greatly distressed. Part of her wanted to try cutting herself again on her still scarred hoof like she did when she lost Twilight, but she just couldn't bring herself to do it again this time.

The poor Pegasus Mare had to watch as she lost more and more of her five best friends, with Applejack being the most recent and final friend she lost earlier that night. This ordeal had pained her greatly as they meant the world to her. She stopped to remember the exact moment when Applejack, the last friend she had left, ended up abandoning her as well eventually.

"Sorry Dash, but enough is enough. I put up with ya enough to see that you ain't a good friend. I didn't jump the boat at first unlike the others, but now, I see that you aren't worth keeping. I'm mighty sorry Dash, in the end."

"But... Applejack... After everything we've been through... The Running of the Leaves... The Iron Pony Competitions... Our friendly.. rivalry... You're just going to toss me.. just like the others...? Applej-"

"Enough is enough Dash. Now get on out of 'ere."

"But Appl-"

"I SAID ENOUGH DASH! GET ON OUT OF 'ERE!!"

"I see... how it.. is.. Applejack... Farewell..."

"I was always... loyal.. to them.. I would never leave them no matter what... Even if they were a fuckup.. I.. don't know anymore." Said Rainbow Dash as she was deeply hurt by this thought, getting up from her bed to walk around her bedroom, deep in thought.

"I've been with them through so much stuff... Teaching Twilight how to fly... Being there for Fluttershy... Doing pranks with Pinkie... Going on an adventure with Rarity... Friendly.. competing a-against... Applejack... What did I do wrong enough to make them leave me..." Said a heartbroken Rainbow Dash, as all she could do was cry at the moment.

"Am.. I.. the problem..? I.. see how it is..." Said Rainbow Dash, clearly hurt from her friends backstabbing her. She had not done anything wrong to warrant them betraying her. Sure, she was a bit of a narcissist at times, but that was just part of her personality and even then, she was making a lot of effort to slowly become less narcissistic.

Rainbow Dash felt like she deserved nothing and only deserved to rot in Tartarus for eternity. She sometimes felt as if no one gave a shit about her. Sometimes, she even felt that if something were to happen in Equestria, she would sacarfice herself to save every pony even if she wouldn't be missed and/or remembered by any pony. As Rainbow Dash thought this, a new thought came up in her mind.

"They.. Couldn't even have a bit of loyalty to not break up being friends with me. In fact, I heard that they'll be getting a replacement of me for the Elements of Harmony..." Said Rainbow Dash, as she felt something deep down spark inside of her. Something dark.

"What's this.. feeling.. I don't recall having this feeling.. before.. It feels.. very nice.. and warm..." Said Rainbow Dash as she slowly started to enjoy the feeling, whatever it was.

Rainbow Dash realized soon enough that she was starting to feel hatred, but more importantly, insanity. Instead of panicking, she started to relish the feeling and relish the fact that she is starting to become insane, like the ponies you see in mental institutes in Canterlot.

"This feeling.. It's insanity.. isn't it..?" Said Rainbow Dash as she started to slightly grin with a insane expression. "Why, this is the best thought ever! HAHAHA! I can get back at THEM FOR BETRAYING ME LIKE THAT!" Laughed a insane Rainbow Dash, as she got out of her house and started flying towards Ponyville, thus starting the beginning of what would slowly become Equestria's darkest night, as they would start to slowly lose the Elements of Harmony over the course of the night.

Author's Note

Chapter 1 is done for this dark story of mine! If you haven't guessed by now, I haven't been good while writing this story. I honestly feel like a fuckup of a friend, so then I remembered that the creator of Mario the Music Box used her current real world emotions to make the game, and that was how I thought of making this dark story honestly.