Twilight's Cuckoo Clock stopped working, so she took it to Time Turner to have it fixed. It turns out to be an ancient artifact covered with seals and filled with mechanical impossibilities. What secrets is the library's Cuckoo Clock holding? ((NOT a Dr. Whooves Story))

Following my AU for the MLP:FiM universe where there are multiple kinds of changelings ('prep bugs' and 'goth bugs'), Cipher Stream is a changeling that never turned bright and colorful. He's spent so much of his life hiding this side of him, developing so much fear, anxiety, paranoia, that whenever he thinks he's been found out he panics. A lot.

AKA

I make my purple boy have a panic attack and turn into a buggy.

Everything is okay. It's a sunny day, and everything is okay. She's going to the café with Hoop, and they're happy, and Hoop is not hurt and everything is okay. Stop thinking about it.

The world was going to burn, just like Canterlot was, and all the friendship in the world couldn't have them now. She struck when they least expected it, how they least expected it, and even then no one could believe it was really her that was behind it all. Now, with the world threatening to fall to one little mare, princesses gone, Elements of Harmony lost, Doodle Bug is allowed into the palace to question the mare behind it all: Her dear friend Smoky Waltz.

AKA MLP:FiM original character fanfic? I'm 2020? It's more likely than you think!