Have you ever woke up in the middle of the night and felt uneasy? In the quiet of night, when everyone is asleep, and the world is dark, what could be going on in those shadows that surround you as you lay in bed? What could have caused that noise downstairs? Did you leave the door open? Do you dare get up?

Rarity wakes from a bad dream in the middle of the night, only to find herself feeling that the nightmare isn't over.

Pinkie Pie is dead. Now, everypony, including Pinkie, must figure out who killed her.

Parody of Heavy is Dead.

Reading here.
And here.

When Sunny Starscout jumped into the void to rescue Posey and Windy, she saw something. Something she didn't tell the others about.

This story is a sequel to We're Trapped in Stone, and We Must Scream

For so long, Chrysalis, Tirek, and Cozy Glow stood paralyzed in their stone cacoon; unable to move. To speak. To do anything. But that didn't mean they couldn't see or hear everything around them. For age after age.

But now they've been released from their confinement and are free to bask in a changed world. Unfortunately, the trauma of their ordeal doesn't just fade away.

It's a stormy night. Sunny, Izzy, and Hitch are hanging out at the lighthouse when Zipp bursts in, soaked to the bone and scared out of her wits. Soon, they find themselves facing their greatest and most terrifying challenge yet: Pipp's gangster rap phase.

This story is a sequel to Apple Bloom Meets Mr. Widemouth

Sweetie Belle feels insecure about a lot of things. She's not as pretty as her sister, she's not good with her magic, and she even feels less than equal to her friends. While contemplating these feelings, she meets a strange little creature, named Mr. Widemouth, who says he knows a way for her to better herself.

This story is a sequel to Scootaloo Meets Mr. Widemouth

Mother's Day is a hard day for Applejack and Big Mac. With said day coming up, Apple Bloom wishes she had a way to brighten their moods. Then she meets a strange little creature who says he can bring their parent's back for a day.

Scootaloo has always dreamed of being able to fly, but it seems such a dream will never come true. That is, until the young Pegasus meets a strange little creature who calls himself Mr. Widemouth. He offers to help her fulfill her dream of flying.

Fluttershy has always been afraid of the Everfree Forest at the best of times, let alone in the dark of the night; yet this didn't stop her from making her home so close to it in case any nearby animals needed her help. When she hears the sounds of a hurt animal coming from the forest so late at night, her fear again would not stop her from helping the poor thing.

Then the singing starts.

Reading here.
And here.

After a botched summoning spell, Twilight finds herself facing against a hideous monster full of shwibbly glib-a-kind. Now, she must stop this grotesque obibaglab before he shabblegabbles all her books.