My name is Eureka and I'm a young unicorn mare from Vanhoover. (The town of Vanhoover, not to be confused with Vanhoover B.C.) My cutie mark is a key and I'm very talented at figuring things out.
Applejack uses Rainbow Dash to see if she was just turned off by Trenderhoof or stallions in general. When things start going better than expected, something rather unexpected happens.
Pinkie's friends are very worried about her new addiction. They've rallied together to let her know that she needs to stop, for her own sake and theirs.
This takes place in an alternate world where Twilight and Trixie are the daughters of Celestia and Luna. When it's time for them both to be throned, they realize they were both going for the same title! Rivalry and hilarity ensues.
Pinkie Pie must save her friends from their opposites, the bringers of imbalance. Trixie, along with the new elements of victory, must fight to save Equestria and the elements of harmony. Can Pinkie prevail without her ability to laugh?