They've failed. The Kaiju Earth Defenders have been defeated by the alien race known as the Vortaak.

With Space Godzilla using a mysterious device, the remaining Earth Defenders and Godzilla's son, Godzilla Junior, are transported to a new world known as Equestria

Now stuck in the form of creatures known as ponies, the five Kaiju must rely on the help of five kids and protect their new home from Vortaak and other evil Kaiju.

Main Kaiju and their partners.
Godzilla: partner, Spike the Dragon
Baragon: partner, Applebloom
Anguirus: partner, Button Mash
Mothra: partner, Sweetie Belle
Rodan: partner, Rumble
Later:
Varan: partner, Scootaloo
King Caeser: partner, First Base

Other kaiju:
Godzilla Junior

Note: Inspired by a story whose name I can't remember, and this is my take of the Godzilla Unleashed ending.

A teen goes to a convention with some friends. Dressed in casual wear and walking around, he notices a small pink gem that looks oddly familiar... After buying it from the Merchant he blacks out, waking up in a strange location with blonde hair, orange skin, and a seriously bad case of dragon breath.

I got this idea while watching an old favorite of mine from Cartoon Network called 'Firebreather'. It's about the son of Kaiju King Beloc, Duncan Rosenblatt. Look it up or wait for the story to progress if you're not sure what kinda stuff he can do.

Planning to tie this in with my other Displaced story Promising Shadows.

Tags and such will be added as the story progresses.

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)

Chrysalis has won, Twilight is dying and everything looks hopeless. Still feeling the sting of betrayal from her friends, three powerfull entities visit Twilight's fading mind and offer her a deal. To not only survive, but to assume their mantle of power. Twilight accepts and is reborn as the next Queen of the kaiju.

This is all based on Snow Ghost Pony's, Kaiju Rumble. Credit for this wonderful idea goes to them.

Edit A\N new cover! This cover is fan art created by Cyanjames2819 and they did a wonderful job. Shout out to Cyanjames, thank you!

Simple, she takes up the mantle of the most powerful beings to ever live! Watch Twilight as she battles enemies from times long forgotten, to claim her place on the Throne of Godzilla, and become the next Kaiju King! Will she be able to tame her rage, and become a savior? Or will she go the same way as Godzilla did, out with a bang?