A My Little Pony: Friendship is Magic/ Sonic the Hedgehog crossover

WARNING!!! Contains big spoilers from the Sonic the Hedgehog (2006) game, as well as a few comic references.

This story contains no crazy crossover shippings, (although strong friendships are formed,) and is my attempt at creating a decent MLP/ Sonic crossover that does well at presenting both universes both with accuracy and depth. I have also tried to keep this so that it is as close to canon as possible for both worlds, although I naturally elaborated on some things.

When Twilight Sparkle and her friends are sent to go to the strange world of Mobius to defeat an ancient evil, they end up encountering a strange, spiky blue creature named Sonic. The ponies easily make friends with Sonic, but soon find that not all of the people on Mobius are friendly. Mysterious events lead to misunderstandings, while an evil villain known as Dr. Eggman is setting his eyes on Equestria as his new target.
And amidst all of this lies a great mystery, a mystery that will shed some shocking revelations on how Equestria and Mobius share a great deal of history, on the origins of the being called Solaris, and on a dark threat that both worlds know all too well.

Other than the listed characters, you will get to see the Cutie Mark Crusaders and a good deal of background ponies share in the adventure, and a bit of Discord, as well as a great deal of short appearances by other .

After discovering that Cadence is not who she appears to be, Twilight is sent to another world entirely by the disguised Changeling Queen to avoid her plan being disrupted.
When Twilight lands, she discovers that not only have Spike, Owlowiscious and Peewee followed her, but that they've arrived in a world where the main sentient species is human.
There's still a place where they teach magic, though.
Crossover with Harry Potter. Twilight will be effectively taking the role of Hermione.

I've marked this story as cancelled to reflect the unlikelihood of it continuing. If I do come back to it I'll revert that.

Crossover with The Avengers

9.12.2014- Cripes, I made the featured box?! Thank you all so much!

After his actions in New York, Odin hands down his sentence for Loki's crimes. Instead of execution or being locked in the Asgardian dungeon for the rest of his natural life, Loki will instead be sent to live with his granddaughters, to learn the virtues he is so desperately lacking.

Loki didn't know he had granddaughters. He had even forgotten he had a son in the first place.

And to make things even more complicated, said granddaughters are magical pony princesses in a magical land of talking, technicolor ponies called Equestria.

Yeah. Things are gonna get interesting.

An accident in the lab sends our favorite boy genius to Equestria, as a pony. What will he do and how will he get back? The answer: Science! (Cover Art Updated!)
New FAQ! and TV Tropes!
Planned Phrases from Dexter:
“Pinkie Pie! Don’t push that Button!” /to Pinkie
“Please, Magic is the word simpletons and the ignorant use to describe what they cannot understand.”/ to Twilight
“No, I didn't strap a rocket to you. I strapped you to a rocket.” /to Rainbow Dash
“Friends? Who needs friends?”

Dexter is a boy super-genius with a disdain for anything girlish and no desire for friendship. After an mishap in his lab, he gets stuck in Equestria. How will he cope with the over-friendly ponies, and the girlish everything?
For any who do not know Dexter's Lab: http://en.wikipedia.org/wiki/Dexter's_Laboratory
[RIP Christine Cavanaugh: 8/16/63-12/22/2014] - Dexter's Original Voice Actress

(SPOILERS IN STORY AND DESCRIPTION)
Wheatley is trying to get Chell to jump into the pit of nothingness, and she doesn't listen until Wheatley says a pony farm is down in the pit, so Chell jumps down and is teleported onto Applejack's farm. Not too long after, Wheatley begins to question himself what happened to Chell and POTaTOS. He ends up sending a turret named Annabelle (my character) into the pit to see what in the name of science is going on down there, when things take an unexpected twist...

Made Teen for swearing.
Edit 3/13/14:
Hey everyone! I'm going through the story and formatting now, and more chapters will be uploaded soon!
Hopefully people remember this fic...

Be Awed and Amazed by the tale of Sweetie Belle as she traverses the multiverse in search of her lost mentor and friend, Twilight Sparkle! Will she find her in post-apocalyptic Equestria? Or maybe in a strange world where everypony is the wrong gender? Or even where a Pony claims to be a human? Read as she journeys through very familiar worlds you might have read about... if you dare!

At this point in time all the main worlds to be visited have already been chosen. Thank you all for the suggestions, and I hope you enjoy the surprises!

Here's the official TSC:F Music Intro: The Sweetie Chronicles: Fragments

WDTP: S2/3-CE
You can also visit the TV Tropes Page which has spoilers!

A Mysterious artifact is revealed at the London Museum, and renowned archeologist Professor Layton and his apprentice Luke are invited to the unveiling. But something is off about the artifact and the woman who happens to be the most intrigued about it.

When the artifact and the woman are shown to be much more then at first glance. A deeper mystery is uncovered that threatens not just London, but all of Earth and another world as well...

Twilight Sparkle thought her life couldn't get any better. She was a princess, she had great friends, and a comfortable home. Perfect, right? That is, until she receives a letter from the Headmaster of Hogwarts School of Witchcraft and Wizardry, Albus Dumbledore!

Harry Potter/My Little Pony Crossover
Do let us remember that this is a fanfiction site? I do not own anything.

Emperor Pilaf wishes Goku away with the Dragonballs. He finds himself in the land of Equestria, where a pegasus named Fluttershy takes him in. How will the residents of Ponyville react to the young Saiyan?

NOTE: Chapters 5 and onward are Edited by VunderGuy

DOUBLE NOTE: This story was formerly known as 'Goku in Equestria', though I've noticed that there are also two other stories with the exact same title lol.

Reading an epic tale of one of the Third Hokage's missions, a 6 year old Naruto sets himself on getting some awesome summons of his own. Unable to find a contract on short notice, and not understanding why a contract is required, he goes through the necessary motions anyways and winds up in Equestria. Can Naruto convince the locals to let him be their summoner? Is the ninja world ready for the likes of Pinky Pie? Just how much will a young Naruto benefit from the Magic of Friendship?