All Carrot Top wanted was a vacation, but when the Tyrant Sun appears and lays siege to the industrial city of Stalliongrad, the simple carrot farmer finds herself in way over her head. Trapped far from home, with only a few friends beside her, Carrot Top must help marshal the city's defenses and keep the civilians safe--both from the implacable monster outside the walls, and the increasingly unstable chaos within them. Between dwindling supplies, a Discordian anarchist, insane sun cultists, and a city government that refuses to believe the walls could fall, the farmer will have to overcome a host of problems in order that the innocent ponies survive the coming disaster. But overcome them she must, because the coldest city in Equestria will otherwise go up in flames... and will take one million ponies with it.

Lunaverse story, set at the end of the 'Winter' portion of Season 2. Note that RDD has reserved judgement on whether or not this story is canonical.

Three hundred years ago, Equestria almost invaded the peaceful and idyllic nation of Cavallia, the homeland of Princess Mi Amore Cadenza.

The invasion would have been accidental.

It was quite awkward.

Last year, Lute, a pegasus foal living in Canterlot, spent too much time lollygagging around, and got almost no candy on Nightmare Night as a result. He learned a valuable lesson then: time is candy. This year, he doesn't care about costumes, parties, the spirit of the season. He simply wants to get as much candy as possible, as quickly as possible.

But that is not in the true spirit of Nightmare Night...and the Nightmare does not approve...

A Lunaverse story, but barely. The cast is essentially entirely OCs.