A Small Smile

Normal Point of View:

Waking up from the streets of Ponyville, Pinkie Pie walks to the library to seek some help from Twilight, but saw a note on the door on the back when she closes it.

"A...a note?" Pinkie Pie said to herself. "She couldn't be..."

She read the note upon the door it said:

If you are reading this, this means that I and my friends are on a mission for finding for the new role of the element of Laughter. Due to the Demonic Smile event, there was no connection of bringing pure happiness if there was a piece of the elements has a hole on it in Equestria. If you needed any questions or need to borrow books, just write down your name and title you borrowed on the scroll at the center.
~Princess Twilight Sparkle

Pinkie Pie wanted to look up a few books of what kind of creature that Pinkie Pie was attacked by. She quietly takes a book that was titled "Dark and Demons" and searched for clues about of what she is needed to find the culprit of Pinkie Pie's demonic smile that was obliterating everyone.

After hours of searching and finding clues, Pinkie Pie searched for over 20 books and still clueless of what she is looking for, of not being distracted, but she was still confused. On the first book, she was still on the page of the picture of a dark pony with a devilish smile. Pinkie Pie looks up the demonic pony and read it out loud.

"Smilion Oblivion, a demonic pony who almost lead Equestria towards its end, legend has it that everytime when a happy person who wanted revenge on her friends who laughed at her, he'll create death and destruction on his path, but when the princesses takes him down, he was sealed away into a happy one's soul. In order to destroy him, you need the help of a loved one and destroy Smilion"

Pinkie Pie looks down at herself and a twinkles upon her eye and saw that her soul was corrupted by Smilion Oblivion, she stands up and takes the book with her to find the way to destroy Smilion Oblivion.