A Sonic the Hedgehog/MLP:FiM crossover. Eggman enacts a new plan to defeat Sonic the Hedgehog, one which involves our beloved cyan pegasus. Rainbow Dash is pulled into the world of Mobius, and struggles to find a place for herself and make it back home. However, someone unseen is pulling the strings of this conflict for his own ends, and everyone is being pulled into it...whether they like it or not. And what will Rainbow Dash do, when she is forced to choose between her friends and her own heart?

This story is a sequel to Harmony of Chaos

Shadow leaves Mobius for Equestria after Discord's defeat, hoping to make a fresh start. However, his friendship with Twilight develops until it becomes stronger than he'd anticipated, and leads him to a future he'd never dreamed possible.
However, while Shadow's life takes on fairy tale proportions, Twilight is faced with diffivult emotional hurdles...ones that she will never escape.

When Twilight is called back to Canterlot to see to certain serious Princess duties, her friends seriously miss her. However, Rainbow has conflicted feelings, due to something that she thinks happened the night before her departure. So, when Twilight summons her - and her alone - to Canterlot, with instructions not to tell her other friends, she doesn't know what to expect. Certainly not being sent on a mission of national security with the fate of two worlds at stake, which becomes the start of an adventure of a lifetime.

One thing's for sure. That's the last time she agrees to one of Applejack's drinking games.

Hi, my name is Markus.

I thought it was going to be a normal Sunday morning. Boy, was I wrong. Not even out of my bed I discover that I am now Rainbow Dash... and I'm still on Earth. In wake of my sudden change, I try to handle the situation with my knowledge gained from the fandom, my inner brony writer helping me along the way. However, as I soon find out, I'm not the only one with this problem...

Just a self-insert thing I started to get rid of a bout of writer's block. I don't care if it's liked or hated, so enjoy. Please remember, criticism is greatly appreciated, as is praise.

EDIT: For other stories in this universe, PonyEarthverse

Scarlet Eris. Female Draconequus, chaotic in nature and an over prankster and pain the flank.

"Hey! I am not a pain in the flank!"

However, her pranking days would soon be over as she might have done something that caused her father, Discord, to send her to another dimension and since her powers over chaos is still developing, she has no real way of going back home.

To top it all of, Discord picked a particular creature to balance her rather chaotic nature AND babysit her.

And no one babysits a spirit of chaos.

There will be comedy, shenanigans, hints of romance and not to mention, tons of chaos!

He is in for a wild ride.

"Chaos? Did someone say....CHAOS?!"
-Eris

Update: Holy sh*t guys! This story got featured! Thanks to all for making it happen!

Update 2: (Estimated time of feature removal: 3rd of May, around 6:30 pm Local Time: Singapore) This story's feature was good enough for me, even for a slight duration. Thanks everypony!

Update 3: (Estimated time of feature and removal: 25th of June, 11:45 pm to 26th of June) Wow! Really? Featured again? U for real guys?

Update 3: (You know the drill) Goddammit guys! Stop giving me these features! (But in all seriousness, really guys?)

Hi guys, it's Kro here for another story, this time round, it's about Eris!. I hope you guys like this story. If you don't, then I'm sorry if this seems like a waste of your time.

The picture is by the lovely JaquelinDreamz of deviant art.

P.S This story was inspired by a story that I read but can't remember the name

This story is a sequel to Stardust

When Equestria’s newest member of royalty asks for aid to be offered to her friends from abroad, the best and the brightest volunteer to serve. Captain Steel Song of the Dusk Guard are immediately mobilized to help XCOM defend their world from the enemies that besiege them. However, their first joint operation with the humans takes a turn for the worse and they quickly find themselves fighting for their lives against the full force of the monsters that threaten Earth.

(Stardust/Dusk Guard crossover)
(Coverart provided by a friend of Viking ZX!)
(While familiarity with both stories isn’t required, it is recommended)
(Many thanks to Arzoo for pre-reading!)
(All screenshots can be found at XCOM.wikia.com)
(Featured on 3/13/2013. Thanks everyone!)
(Now has it's own section on TVTropes as part of the Stardust series!)

Scootaloo has never told anypony that she is an orphan, that her parents one day decided not to come home. She has been on her own since she was very little. She has learned to fend for herself, care for herself, and doesn't want help from anypony, including her best friends. It isn't until a certain purple unicorn learns the truth and takes her into her home that Scootaloo realizes she needed help from somepony a long time ago.

Please do not ask if you can continue this story. The answer will be no.

Currently Edited by TimeLord_Whooves, Elric of Melnipony, and Sir Truffles

Formerly Edited by psychohooves and Avatar of Shadow

Cover Art by DawnMistPony
Tvtropes Page
MLPFanartWiki Page

Princess Celestia tires of constantly being surrounded by decorum, deference, and formality, and decides to take a day off from being Princess. But visiting Ponyville incognito is harder than she expects. Will she be able to fit in and make friends without blowing her cover?

This story is a sequel to Stardust

Twilight has finally returned home from the harrowing challenge that Discord set upon her, and the residents of Ponyville and the Elements especially look forward to having their dear friend returned to them.

Twilight, however, has changed. Still suffering from her injuries, almost incapable of using magic and haunted by the memories of her time on Earth, she becomes increasingly withdrawn from those who were closest to her. Will her frustration at her current state and her friends inability to understand her experiences cost her what she valued most before Discord's bet?

(Sequel to Stardust, familiarity with this is recommended!)
(Proofread by Arzoo!)
(Coverart commission drawn by the amazing KairaAnix!)
(Crossover with XCOM: Enemy Within, though the crossover and human elements are minimal)
(Featured 4/28/2014, thanks folks!)

Isolated from her friends and taken prisoner in the middle of a war, Twilight must deal with the very real dangers of being percieved as an enemy as well as the nightmares of her arrival on 'Earth'. Can she overcome her own fears and the fears of her captors? Will the wayward unicorn's assistance be a boon or a curse to the 'humans?' Most importantly, will she ever find her way home?

"In short, it's a story of friendship and plasma rifles, with the emphasis on the friendship. The characters are well written, the XCOM setting is fleshed out very well, and the story is compelling. If you love XCOM, you'll love the story, but even if you've never heard of it, it's more than worth giving the first 3 chapters a read.

There's excellent action later on, but the real strength lies in the collision between the friendly and naive world of Twilight Sparkle and the desperate world of humans fighting a losing war for survival and willing to do anything to turn the tide."

--Arzoo

(XCOM/FiM crossover)
(Cover art commissioned by a friend and created by the magnificent FoxInShadow!)
(Original cover art by the amazing Carnelian can be viewed here!)
(Gore tag for blood and some violence)
(Many thanks to the studius OminousTen, Arzoo, xXFluttershyForeverXx and finally Setokaiva for giving my rambles a once-over)
(Now with it's own TV Tropes page! Get to tropin' folks!)