Takes place after the 'Holiday Special' comic of 'Equestria Girls' and the 'No Such Luck' episode of 'The Loud House'.
Sunset Shimmer, still greatly hurt by what she went through during the Anon-a-Miss fiasco, decides to leave Canterlot High and break up with her friends. Along the way, she meets an 11 year old boy with white hair named Lincoln Loud, who ran away from home after getting tired of being perceived as bad luck by his insanely superstitious family and forced to wear a squirrel costume for good luck. The two exchange their histories and quickly become good friends. Meanwhile, Sunset's friends, the Humane 5, and their younger sisters, the Crusaders, miss Sunset and decide to go look for her in hopes of completely making amends and rekindling their friendship. They eventually meet the Loud family, Lincoln's parents and 10 sisters, who are out looking for their son/brother. The two groups decide to join forces and help each other find the people they’re searching for and make amends for their mistreatment.

This is a retelling and extended version of the Canterlot Wedding with a couple new original characters who will take the story down a different and darker path.

Link to TV Tropes page:
http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/LovedAndLost

The lives of Celestia, Luna, Cadance, Shining Armor, Spike, and the Mane Five have gone downhill. They all reflect on the events that led to their situation. The changelings were beaten but the wedding was cancelled. Prince Jewelius, another nephew of Celestia and younger cousin of Cadance, holds all of them responsible for the disaster. He then has the three princesses removed from power and all ten of them exiled from Equestria while he takes the throne for himself. With the fate of Twilight Sparkle unknown, the group of outcasts decide to return to Equestria to find their beloved unicorn friend and earn back their lives. But Jewelius is determined to get rid of them no matter the cost.

(Crossover with a Universal horror film loosely based off a story by Edgar Allen Poe.)
The girls are enjoying a break from school. Along the way, they meet Dr. Vitus Werdegast, a psychiatrist traveling to see an old friend, Hjalmar Poelzig. When their bus crashes and Sunset Shimmer is injured, they find themselves subject to the dubious hospitality of Poelzig, and discover that Werdegast seeks not friendship, but vengeance against Poelzig. Poelzig is revealed to be the leader of a satanic cult, and plans to sacrifice the girls in a ritual.

When Shining Armor and Cadance come to Canterlot to celebrate the anniversary of their wonderful wedding with Twilight Sparkle and her friends, they are visited by a strange stallion who desperately needs their help. Surprisingly, the strange visitor is Shining Armor from an alternate world where the Canterlot Wedding was a complete disaster. In that world, the betrayal of her loved ones and the deaths of both Cadance and Queen Chrysalis drove Twilight mad and caused her to succumb to her darkest emotions and become Equestria’s newest and most dangerous enemy: Midnight Sparkle. Allied with King Sombra and the Crystal Empire, she has waged a vengeful and merciless war against all who do not support her. Do Twilight and her friends have what it takes to save a world where certain events happened differently from those in their world?

Unable to take the cruel and wrongful accusations of her being the secret-posting blogger, Anon-a-Miss, by her former friends and the rest of the students of Canterlot High; Sunset Shimmer runs away vowing never to return. When the true identity of Anon-a-Miss is finally revealed, it is too late. The guilty and remorseful students of Canterlot High set out to find Sunset. Little do they know that their holiday season is about to get even worse. Their mistreatment of Sunset has attracted the legendary punisher of the naughty, the Krampus. Krampus and his helpers begin hunting the students one by one with the intent of giving them a Christmas in Hell. Can Sunset Shimmer find in her heart to forgive all who've wronged her and save them from a fate that is probably more than they truly deserve?