It is very rare for Pinkie Pie to be gifted with such a horrible day where everything seems to go wrong, however as she has that exact day, she begins to notice something strange.

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Thanks to Stargazer for the help in brainstorming.

Spike is the only dragon in Cantorlot. He was born and raised there and has earned The Princess's deepest trust. But when he fears danger will strike she wont listen and sends him and his assistant, Twilight Sparkle, to Ponyville. The Princess said that Spike needs to meet more ponies then just Twilight but Spike knows there is danger and will try as hard as he can to stop it.
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This is like a remix of the first episode but with twists.

A bizarre incident involving an exploding pig at the Carousel Boutique leaves Rarity in shock and unable to work. Twilight keeps her nice and comfy at the library, but Rarity still has duties to fulfill. Somepony will have to take her place for a few days. Shenanigans ensue.

Also, obligatory author's note:
Good morrow, fellow FIM fictionwriters! This be my first pony-oriented fiction, so I sincerely hope you enjoy it. :D I've been a fan of FIM since July 2011, and I love a good bit of creative writing (and reading :P) - but only recently did I think that I needed to write a little something about our favorite pint-sized equines. Cheers to my brother for helping out with the ideas process, and proofreading it. He's got a fic of his own in the works, so look out for that one soonish, I guess. :P

While foiling one of Robotnik (Eggman's) plans of world conquests, Sonic is unknowingly sent to Equestria and meets its heroes But he doesn't come alone; something else has followed him to the land of ponies. A power that could destroy the very land beneath his feet.

Hello everypony,
this is... probably the first ever Amy rose cross over ever put on this site... and to be honest that's why I put it up here... so anyway... the story is pretty much about Amy and Pinkie Pie... read more to see what's going on!

One afternoon, when Twilight and Fluttershy are exploring antique stores, Fluttershy purchases a gem that claims to grant any wish she desires. Some may think she'd wish to have more animal friends, or to have better speaking skills. Instead, she wishes that she could fly like Rainbow Dash.
The next morning, Fluttershy wakes up. Except for one thing. She has no idea where she is, or why every pony expects her to go along with a lifestyle she never knew she had.
As a great unicorn once said, magic does what it likes. Sometimes, it changes all aspects of reality, and tweaks the future.

After having a stern talking to from the Cakes, Pinkie feels she needs to start taking her life more seriously. She begs Twilight to use a new spell to change her personality so she will be more 'serious bu-derious’ and not silly and random. Twilight uses the spell but instead it ends up giving her horn to Pinkie and while Pinkie is a very intelligent and studious unicorn, Twilight is a silly and random Earth pony who wants to constantly throw parties. Pinkie must put up with living like this for an entire day and keep anyone else from finding out that Twilight was also affected. It will all be fine, the personality-switch spell will be over in just 24 hours..........or will it?

Original release: May 21-29, 2011 on Deviant Art

Scootaloo finds out that, with the right piece of mind and willpower, you can switch somepony else's cutie mark, even if you don't have one. So, naturally, she tries to switch everypony's cutie mark, with no success.

Thinking that she got cheated out of another cutie mark opportunity, she goes to check on her friends. What she finds there might just be a disaster... or an opportunity.

Each pony in the Mane 6 wakes... to find that they are one of their best friends, although keeping their personalities and colours in their new shape. The six mares must adapt to this new life, but it won't be easy. What will happen if somepony finds the key to Pinkie's dark secret, or Rainbow's stash of Playpony magazines?

Hilarity will ensue, that's what.

An accident involving some untested potions, leaves Applejack and Rainbow Dash transformed beyond recognition and unsure of who they are while in an unfamiliar city.