Story One: The electrified tension between the past and present
After a drunken question on how to become braver, Pinkie Pie hands her a horror novel with the advice to keep in mind that it is only a story, but when a pony off the edge of the forest bears a striking resemblance to the pony in the story, Fluttershy realizes the worst.

Bubble Berry has done his best to model Pinkie Pie's world in every aspect, but when Discord manages to enter Bubble's domain, the clock is rewound, and Discord breaks the mane 6 colts apart before they even have a chance to meet. Bubble must bring his friends together again before Discord grows powerful enough to wreck their sister universe once more.
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What I mean by alternate universe is that all important characters (mane 6, the princesses, etc.) are genderbent, so this is MLP as colts.