This story is a sequel to LEGO Equestria Girls 9

In an alternate world where everything and everyone is made of Lego, the Equestria Girls of Canterlot City's LEGO Team are forced to flee when an alien army known as the Changelings suddenly invade their home city.

Forced into hiding, the girls must rely on any assistance they can get, from an old friend from Equestria, to a team of ninjas, and even possibly one of the Changelings who desires a change of heart for his kind. But as a result of loose Equestrian Magic, Queen Chrysalis, ruthless leader of the Changelings, has obtained a special advantage.

When facing off against a shapeshifting army from outer space, their struggles will take them to distant places they could have never imagined. What exactly are the Changelings and their queen hoping to achieve? Can the Equestria Girls succeed against their greatest foe yet, or will they have finally met their match?

(Takes place alongside the events of LEGO Equestria Girls 10, LEGO Equestria Girls 11, and LEGO Equestria Girls 12.)

In an alternate world where everything and everyone is made of Lego, the group of LEGO Team members known as the Equestria Girls have been on many adventures, and continue to do so, but those aren't the only stories worth telling. Sometimes, interesting events occur around those girls during the calm between adventures. Sometimes, some of their lesser known allies find themselves caught up in the events surrounding the latest major adventure. And sometimes, some of the most unlikely of people end up caught in the middle of all that madness. This collection of short stories will reveal some of these minor events that might nevertheless contribute to the complete series. (Each summary will be accompanied by a note specifying when in the series of events each short story takes place.)

Summaries of each short story:
Twinlight Sparkle: Princess Twilight Sparkle of Equestria takes an opportunity to visit the Lego World once more, and decides to better acquaint herself with... herself, by accompanying her Lego World counterpart as she spends a day in her secret laboratory. (before story 10)
Passing the Torch: Applejack and Rarity meet with Pinkie Pie, who is in the middle of planning a retirement party for a prominent leader of business in the Lego World, and such news makes them realize just how much time has passed since the beginning of their adventures. (before story 10)
The Curse of the Time Twirler: Ever since the time loop incident at the music festival, Sunset Shimmer has been curious about how the Time Twirler, an Equestrian artifact, ended up in the Lego World, and thanks to a magical staff provided by Princess Cadance Playwell, she is given a vision from the past of how a group of tomb raiders ultimately destroyed themselves because of that magical device. (story 10, between chapters 1 and 2)
Juniper’s Heroic Act: Not long after the Changeling army had captured Canterlot City, Juniper Montage finds herself caught up in an unlikely chain of events that ultimately leads her to making a daring effort to save a civilian in peril. (story 10, between chapters 1 and 2)
(more will be added with each update)

(Takes place between LEGO Equestria Girls 9 and LEGO Equestria Girls 10.)

The Equestria Girls of Canterlot City's LEGO Team have been to many places and defeated all kinds of threats to the Lego World involving Equestrian Magic. Now, as the holiday season arrives, the girls decide to relax and celebrate by traveling to the ideal holiday destination of the Winter Village. As they spend a month at this special region, they'll find themselves on several misadventures.

Summaries of each short story:
Winter Blast: The girls ride the famous Holiday Express train to the Winter Village, but faced with a blizzard upon arrival and somehow forgetting to bring their winter outfits, they must brave the brutal weather just to reach the cabin they rented for their stay in the village.
Operation: Soufflé Delivery: Pinkie Pie is determined to finally bring her holiday soufflé to Rarity while it's still fresh, but she and Sunset unexpectedly find themselves forced to make the delivery run right through the middle of a snowball battlefield.
Past Reflections: While on her way to a friendly meeting with Twilight, Sunset encounters Emmet and Lucy from the former city region of Bricksburg, and as the four of them share stories of their past adventures, they realize they all have quite a lot more in common than they first thought, while also learning some valuable friendship lessons as well. (contains spoilers for The Lego Movie 2)
Secret Stash Recovery: To make up for one of her past crimes, Sunset decides to retrieve one of her secret stashes and donate it as holiday gifts for children, but when she's unable to find where she left that stash, all of her friends will have to work together to figure out it's hidden location.
Holiday Rush: The girls are ready to exchange some gifts, but Rainbow Dash had completely forgotten about the event and is now forced to quickly search through all the shops in the village to find one, and is ultimately left with no choice but to accept some assistance from the one person she never wants to be anywhere near.
The Ridiculous Robbery: The girls have been invited for the rare opportunity to tour Santa's workshop not far outside the village, but when a certain pair of robbers suddenly drop in and threaten to ruin the holiday for everyone, the girls must once again work together to save the day.

This story is a sequel to LEGO Equestria Girls 8

In an alternate world where everything and everyone is made of Lego, the Equestria Girls make another attempt to simply enjoy themselves without worrying about fighting any evil or otherworldly magic by attending the Starswirled Music Festival.

While everyone has their own plans to have a good time at this music festival, Sunset's involve spending the first day with Pinkie Pie for their one and only opportunity to watch a live performance of their favorite band, PostCrush. But things get weird when Sunset finds herself repeating that first day over and over again.

Caught in a time loop with seemingly no one else to share her experiences, Sunset Shimmer must try to figure out what caused it and how to stop it, and hopefully not go completely crazy in the process.

This story is a sequel to LEGO Equestria Girls 7

In an alternate world where everything and everyone is made of Lego, the Equestria Girls attempt to finally enjoy a relaxing vacation on a week-long luxury cruise, without having to worry about fighting any forces of evil.

However, Rainbow Dash is convinced history is sure to repeat itself and believes that evil magic from Equestria is bound to show up. The rest of her friends are highly skeptical of that, especially when her efforts to find it only result in ruining their vacation.

Is Rainbow Dash just wasting her efforts and there's really nothing out of the ordinary going on at all? Or is there actually some sinister force that no one, not even Rainbow Dash, could have possibly expected to encounter?

(Takes place between LEGO Equestria Girls 7 and LEGO Equestria Girls 8.)

The Equestria Girls of Canterlot City's LEGO Team have defeated a number of villains over the years, many of whom later regretted their poor choices. Convinced that these former villains deserve a second chance, Celestia Playwell has decided to create a new team within the LEGO Team that would consist of these former adversaries, and assigns the seven Equestria Girls to go out and invite them to join this new team. Some candidates are easily reasonable, others are rather questionable, and a certain few are so controversial that only two of the Equestria Girls are even told about them.

This story is a sequel to LEGO Equestria Girls 6

In an alternate world where everything and everyone is made of Lego, a new theme park opens just outside of Canterlot City, and its PR manager, social media celebrity Vignette Valencia, offers Rarity the opportunity of a lifetime.

Once opening day arrives, Applejack struggles to maintain her friendship with Rarity, who has grown increasingly stressed with preparations for the parade scheduled for later that night. Meanwhile, Vignette takes advantage of her phone being enhanced by Equestrian Magic to modify everything and everyone around her to satisfy her every desire, even risking the lives of the rest of the Equestria Girls in the process.

Can Rarity and Applejack overcome their issues and reconcile their friendship? And can they and the rest of their friends stop Vignette before she takes her abuse of Equestrian Magic too far?

This story is a sequel to LEGO Equestria Girls 5

In an alternate world where everything and everyone is made of Lego, the girls of Canterlot City's LEGO Team, better known as the Equestria Girls, have planned to spend a relaxing week-long vacation in Lego City.

But just when things get underway, Sunset Shimmer is shocked to discover that seemingly everyone has somehow forgotten that she is part of a team of heroes, and believe her to still be the wanted criminal she once was.

Isolated from her best friends, Sunset must rely on some of the most unlikely sources of assistance if she is to have any hope of finding out what happened, who was responsible, and to reverse the effects before it's too late.

(Takes place between LEGO Equestria Girls 5 and LEGO Equestria Girls 6.)

Starlight Glimmer has been given permission to spend the next few days in the Lego World with her new friends, so she decides to spend that time with each of them individually to learn more about this alternate world they live in. All seven of them are excited to show her their favorite aspects of their world, and in a world made of Lego, all kinds of craziness is sure to occur.

Summaries of each short story:
Kung Fools Fighting: Sunset Shimmer takes Starlight to the dojo where she once learned the basics of hand-to-hand combat, hoping to pass her impressive fighting talents onto Starlight so that she could be ready to defend herself in any situation.
Flight Simulator Extreme: Rainbow Dash teaches Starlight how to pilot an aircraft by using a flight simulator, but the first attempt doesn't quite go very smoothly.
Gunslinger Shenanigans: Applejack shows Starlight how to use a pistol, and throughout the practice session, Starlight ends up learning both the advantages and the hazards of firearms.
Mistress of Disguise: Rarity shows Starlight a wide range of different outfits she has designed for her friends, specifically the ones she had just created especially for Starlight.
Pet Shop of Wonders: Fluttershy shows Starlight all kinds of animals she cares for in her pet shop, including a creature unlike anything from Equestria.
Highs and Lows: Pinkie Pie shows Starlight around her secret party planning cave and ends up demonstrating a rather funny party trick.
Twilight’s Laboratory: Twilight Sparkle invites Starlight into her secret laboratory, where she performs scientific experiments and invents all kinds of incredible gadgets and devices.

This story is a sequel to LEGO Equestria Girls 4

In an alternate world where everything and everyone is made of Lego, the LEGO Team of Canterlot City may not be sent on missions very often, but that doesn't mean they won't see a lot of action, even in their home city.

First, in an effort to save Camp Everfree from its financial troubles, Rarity convinces her friends to enter a contest, but a familiar group of former Shadowbolt agents will provide them with some serious competition.

Later, the team is invited to a film studio, but soon find themselves trying to solve a mystery when a series of incidents threaten to shut down production of an upcoming movie.

Finally, while a mirror altered by Equestrian magic threatens to further corrupt someone seeking vengeance, Sunset Shimmer takes the opportunity to show the Lego World to Starlight Glimmer from Equestria.