Red Team had been given an assignment. It wasn't the usual sort of assignment. They were assigned to defend their base 'until further notice'...and then never received notice. All announcements sounded pre-recorded, and enemy assaults were few and far between. The enforced inactivity was slowly fraying the bonds of the team...

...until something unexpected arrived. A tiny creature appears one day in their fortress, in need of compassion and care. Somehow, she finds that in this group of strange individuals, as she becomes their baby.

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Crossover with Team Fortress 2.
Part of the PWNY-verse.

Edit: Since I get these comments a lot, I will say here, I've never played the game and don't intend to include much in the way of game mechanics, so please don't suggest such things.

Edit 2: FAN ART! for chapter 9 by G_Haze. Makes me so happy.
Edit 3: More fan art from G_Haze, This guy's amazing!
Edit 4: New fan art! by The Pyromanecer. Thanks so much!
Edit 5: More fan art by shiningkord98.
Edit 6: New Fan Art by The Pyromancer
Edit 6: More awesome fan art from G_Haze! So awesome!
Edit 7: New fan art by Pioneering Author

Dr. Albert Wily...mad genius, evil scientist, brilliant roboticist, wanted criminal, would be world conqueror, loving father... Wait, what was that last part?

When Dr. Wily wakes up one morning with a tiny unicorn inexplicably clinging to his bald head, he is more than a little flummoxed. Unknown to him, this tiny creature is about to turn his entire life upside down, worm her way into his heart...and make his dreams a reality.

Can you feel the Wub tonight? Mega Man sure will.

Part of the PWNY-verse.
Edit: Now with awesome cover art by sanyo21! How does he do such awesome artwork so fast?
Edit 2: Adorable fan art sprite by SteamingBullet!
[img]http://orig14.deviantart.net/af07/f/2015/257/9/a/vinylwily_by_steamingbullet-d99jln2.png[/img]
Edit 3: New fan art commissioned by a fan!

>barges into your fanfiction site
>drops story
>refuses to elaborate further
>leaves

*If you'd like to purchase a physical copy of this story, click here*

One of Equestria's greatest traits is tolerance. Every pony, whether Unicorn, Pegasus, or Earth, is accepted for who they are, and have their own parts to play in keeping Equestria running.

But what if an Earth pony decided he didn't want to play his assigned part? What if he wanted to rise above everyone else and become an Alicorn? Such a thing is possible... but the path to fulfilling one's dreams is never simple. Risks must be taken. Sacrifices must be made. And the question is always asked: How far would you go to get what you wanted? And would you be willing to pay a terrible price to get it?

This is a fic based on the Time Loop Files, the format of which was first codified by Innortal on fanfiction.net.
Here's a brief guide.
The basic idea is, one character (the Anchor, usually the main character of a fictional setting) is looping back to the very first moments of their parent series every time either they die or some kind of time limit expires. They of course end up monumentally stir crazy given enough time.
Eventually others start to loop as well.
The reset is not always perfect. Sometimes a loop's history will be different to the "prime" loop, or canonical plot.
"Crossover" or "Fusion" loops also occur, randomly. These can involve the home loopers having a guest, or the anchor for one universe spending time in another, or replacements of one character by another.
Vacation Loops are where the Anchor (or others) decide/s "buck it" and lets off steam by doing whatever comes to mind. There's little or no attempt to maintain the original timeline.

In addition, and particularly more recently, it should be known that this story has a collaborative element to it - people may submit loop ideas or loops, ideally at the Spacebattles thread (a link to the current version of which is on the Trope page), and they may become included.

There's two page image options, thanks to Filraen - the current page image has been edited by the original creator from this work of theirs.. The other one is here:
http://hourglass-vectors.deviantart.com/art/MLP-Loops-466030169