This story is a sequel to Elementals of Harmony

Ditzy Doo returns home one day to find an old friend waiting for her with dire news and a brain in a jar. With the latter, she will witness the answer to a pair of ominous questions: What if Jin-Gitaxias was a brony? What if New Phyrexia tried to invade Equestria?

As noted above, this is a sequel. Read the first story first, or little if anything will make sense. A certain level of gore and body horror will inevitably arise, given the nature of Phyrexia (For the card game illiterate: Like the Borg, but with more magic and much less attachment to the humanoid form.)

Cancelled after a long remission. You can see what would have been here.

This story is a sequel to Elementals of Harmony

A collection of stories set in the same Multiverse as Elementals of Harmony. Among other things, you will learn about Lyra's employers, how Equestria was made (really), and whether Luna snores.

A Friendship is Magic: the Gathering crossover, like its predecessor. Reading Elementals first is strongly recommended, as there will be spoilers.

Categories have been chosen in light of the wide range of tone.

One of the endless possibility of the continuum shift finds six unique girls brought into to the world of Blazblue.

Separated, the girls must navigate their way through the 13th hierarchical city of Kagutsuchi and possibly receive some help or hindrance from the Blazblue cast along the way in order to find each other and get back home.

Harry Dresden, Chicago's only professional wizard, accidentally travels to Equestria after being attacked in the Nevernever. Twilight is none too amused with their newest 'guest', but trouble is brewing. Somepony is planning something sinister and the mane six may need Dresden's help however little some of them want it.

Story Image by: Lynxgriffin
Cover arrangement by: Novel Idea

Something is gathering around the bearers of the Elements of Harmony. Something dangerous. Something magical. There's only one pony with the knowledge, the skills, and the muffins needed to save Equestria as we know it.
A Friendship is Magic: the Gathering crossover, taking place between seasons 1 and 2. Here there be flashbacks, briefly seen OC's, and possibly every emotion known to man or tiny horse. Abandon all pretenses of not being a nerd, ye who enter here.

Twilight has discovered a strange old book purportedly written by Star Swirl the Bearded, and Rainbow Dash discovers a latent spell in it that transports the two ponies to a strange island in the middle of nowhere. With no viable options available to them, Twilight and Rainbow begin to search the island for clues to a way home and the reason behind the odd puzzles and contraptions presented to them.

Dramatic Reading here.

During the battle with the changelings, a trapped Discord manages an undirected spell that reaches across universes to bring an agent of chaos to Equestria. What's brought back more than qualifies.

Steam! Gears! SCIENCE! A very confused Spark! And, eventually, really good coffee.

Here comes Agatha Heterodyne--MARE GENIUS!

This story is a sequel to Aitran

Twilight and Rainbow are asked by Star Swirl the Bearded to take on the challenge of finding his lost wife and daughter in the decaying world of Sohndar, which is ruled by an old enemy of Star Swirl's family who has been trapped there for uncounted years. Although their adventures in the worlds of Aitran have given our heroes the confidence to succeed, they'll soon find that Sohndar is an entirely different bale of hay.

Image by Muffinsforever

More popular than the "Celestia's Homecare" omnibus, better selling than "Fifty-Three More Things to do When Trapped on the Moon", and more controversial than the infamous "Cupcakes", how does the story of this remarkable book differ in a universe full of... pony?

After escaping the destruction of Equestria at the hands of some big ol' meanies, Pinkie Pie leads her friends on a series of baffling, mind boggling and downright nonsensical adventures through a galaxy where harmony is in short supply, but aliens, monsters and chaos are most definitely not.

Gasp! As they meet strange alien creatures!
Cry! As emotional torment assails our characters!
Groan! As the Author includes yet another 4th wall break!

And most importantly, DON'T PANIC

Crossover with the Dresden Files. Sequel to Forever!

For his first task as the new Winter Knight, Harry must travel to the land of cute little cartoon ponies to stop a plot by the Order of Blackened Denarius that threatens both Earth and Equestria.

Warning: Includes massive spoilers for the Dresden Files series up through Ghost Story.