Please do check out the Reading List by Lance Omikron to navigate the Amalgam Universe most clearly

A massive war of titanic forces is taking place in the Kaiju's world. However, when two faction's leaders, the current Godzilla and his 'brother' Xenilla duke it out; humanity unleashes its most devastating weapon. Something beyond comprehension occurred and the boundary that divides worlds, if only for the briefest of moments, was torn to shreds. New forms are taken, new bodies assumed. But old hatreds die hard. But how well can hatreds continue in the world of love and tolerance? Especially with its own demons follow it there?

Godzilla Franchise by Toho Company Ltd.
My Little Pony is owned by Hasbro Studios.
This is a non profit fan-work and I claim no ownership on the IP itself.
Story created by Tarbtano
Co-created and Contributed by Faith-Wolff and Skylark8756

HOLY SHEETZU WE GOT FEATURED! THANKS GUYS!
6/27/2014
Now on TV tropes (Thanks Raidrik, VampyGirl; Lance Omikron, Ultimomant, and ZimFan!)

Kaiju Cast:

Godzilla a.k.a Gojira
Xenilla
Mothra
Anguirus
Rodan
Destroyah

[Character copyright of Toho and Daiei Company, artwork property of Matt Frank]

(for any G-fans, Xenilla is the kaiju you may know as Spacegodzilla. I changed the name because I got quirked about typing it repeatedly and am writing the story so it can at least be understood by just an MLP or just a G-fan; and thought it get very confusing that one character's name was just another character's name with an adjective. Also... don't pretend it's the most imaginative name Toho has every made)

Over a thousand years ago, two royal siblings fought for the sky and were exiled, one by her sister's hoof, and one in penance for what she had done.

In the present Republic of Equestria, no one remembers them as anything more than legends and old pony tales. Save for one shy filly who fell from the sky one fine summer's day.

An Alternate Universe "What If" tale, reconstructing the beginning from a different angle.

An alternative to HiE stories. Midnight, a 14th century knight's steed and veteran of numerous battles during the hundred years war, faces her demise during one such engagement only to find that fate has other plans in store; including a chance to start anew in another world. But can a mare who knows nothing but conflict adapt to a land ruled by peaceful pastel-coloured ponies, or will it prove too much?

Warning: contains brief scenes of descriptive violence; especially in earlier chapters. Not enough to warrant an M rating, I think, but hopefully the mods will let me know if I'm wrong.

(Cross-posted from my Fanfiction.net account)

A simple Tunneler drone is catapulted from Equestria during the infamous Wedding to Planet Earth. Confused, injured and alone, the drone must figure out how to survive in an alien environment with all of humanity watching.

(Crossovers with XCOM, Men In Black and Stargate: SG1)
(Changeling on Earth fic / Available to hire artists for a cover art commission! Current Cover art by Ashinda on FimFiction)

(People have apparently been turned off by the whole 'pet' thing in the title; it's only relevant for a few chapters and has nothing kinky or lewd about it. )

Adventure, mayhem, magic of unknown origins. Oh, and talking ponies. These are the strange events that have brought three friends together into the wildest holiday that anyone could imagine.

It starts as a small Halloween chat, where they showcase their costume designs to one another. However, due to events outside of their control, they soon find themselves in a new land during a turbulent time.

Now trapped in a case of mistaken identity, these friends find themselves thrown into the deep end, when a royal wedding they’re asked to assist with is suddenly interrupted, and the three of them soon find themselves on an extended holiday from any sense of reality they ever knew.

We now have our own An Extended Holiday TVTropes Page:
A big thank you to wille179 for setting it up.
A/N: Now I would like you all to know first of all, this is a collaborative work between myself and some friends. So if you enjoyed this, why not stop by and say hello to the other three writers of this story. I have included their links at the bottom here.
Team Extended Holiday
American Brony - Writer
Teal Speckles - Writer
Shawn820 - Writer
OmniKitsune - Writer/Head Editor
Biker Dash - Editor

Big thanks to Shawn820 for the great cover art.
WARNING: There are spoilers in the comments. Read the comments at your own risk. By all means, please add to the discussions.