One minute you have a changeling enter your boutique,
and the next minute you're getting a lecture of how offensive it is to think changelings are bugs.

Maybe Rarity should've thought twice before hitting a changeling with a flyswatter.

~Another fanfic I now regret writing...way to go Atlas~

Twilight had recently downloaded a copy of Undertale and is having a lot of fun playing it. When her friend found out about the game, they became curious and would like to play it to. They will soon realize that each of them have their own experience playing through Undertale.

Pinkie took a hop, skip and a fall straight into the underworld that exists in another dimension entirely.

Now her mane seems permanently popped, her heart keeps ejecting itself from her body, her cutie mark is missing and she's being constantly beset by strange monsters.

Pinkie fell to these monsters, now she has to dance with her heart to save them and herself.

This is an "Undertale" crossover.

Twilight sparkle is thrown into the world of Undertale, meeting many friends, enemies, and certain evil flowers along her journey back to the surface.

Fresh cookies are a great start to a summer afternoon, and an unexpected surprise makes things even better. What's a little filly to do, though, when the best foalsitter ever is running late, her BBBFF starts acting funny, and her house is filled with molten rock?

In the depths of Mt. Ebott, a voice through Space-Time echoed softly through the cavern, and in its center where daylight shone through, lay a flower patch where a young soulless monster sat glumly. Suddenly the monster is thrown into a world where peace and Harmony reign.

(Placed after Equestria Girls and before Rainbow Rocks.) Twilight goes shopping in the human world...

And runs into the meat section.

ft. Pat the Changeling

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!

After a freak accident, Princess Celestia finds herself in a whole new universe. As she seeks a way home, she is captured by none other than Team Rocket.

Welp.

Now on TV Tropes.

Rainbow Dash got a letter and in its contents held an invitation to The Fastest Race in the Universe. Little did she know it was a trap to capture the essence of speed and the colors of the light spectrum. So her and her fellow racers make a plan to get out of this world destroying event.