Fan Fic / Quizzical
Quiz is not good with parties.
Quizzical is a My Little Pony: Friendship Is Magic fan fiction written by JMac.

Quizzical Greystone is Twilight Sparkle's new research assistant. She may also be the most introverted pony ever. Can researching the magic of friendship help Quizzical break out of her shell?

It has three sequels:

There are also four one shots:

This fic provides examples of: