Rating: Grimdark

It's been a week since the -Cupcakes- incedent, and Twilight is on the look out for Rarity, when she discovers that Pinkie Pie, has been preforming horrible crimes against ponies. Now she and the Royal Guard are in a race against time to save Rarity.

There are many sequels/alternate endings but this one is 'CUPCAKES 2 FAN STORY' located under the list of sequels.
Link to the story:
http://www.equestriadaily.com/2011/02/story-cupcakes.html