Chapter Three: Explained Extractions, Unknown Reasons (edit 2/13/2015)
Strong enough evidence for the multiverse theory, at any rate. i apologize if i made you feel even more uncomfortable than you were already.
Spreading Her Empire Part 1
The multiverse was infinite, thus she would never stop. she was alerted to a deep growling sound behind her. she turned around and saw dozens of lions lying down, waiting for any commands. they were her newest conquest.
A Silly, Merrie, Looney Story (Commission for DragonfireNY)
But, this corner of the multiverse is... well... special. basically, the laws of physics that apply to 99.9% of every other of the billions of alternate timelines out there do not apply here.
My Little Pony: Equedia Ep.1 A New Arrival Pt.1
But that room has to be the most secure place in all the multiverse for the obvious reasons.
Tales From Switch City: Jimmy's Tale
It was a nexus point within the multiverse, an infinite number of timelines and an infinite number of possibilities. some of them didn't even have superheroes or villains! if he wanted to, he could open a portal and move to one of those timelines.
"Daggers of Darkness, Book 4: An Unexpected Discovery", Chapter-2
The realm in which the multiverse exists is considered to be, i suppose you might say, the 'prime'.
Tales From Switch City: Lockely's Tale
Switch city was built on a nexus point in the multiverse. as a result there are an infinite number of versions of it, and it is notoriously easy to switch between different versions.
Scion 2nd Edition Intro
As if explaining it through the lens of a multiverse theory, they are all true. the world of mortals, as we understand it, seems to be a metaphysical melting pot of all these cosmologies blended together.
Princess Luna - Chapter 3
Thousands, millions every day, all over the multiverse. some portal opens up in some unwashed cretin's filthy apartment and he falls through it. you know what happens ninety nine percent of the time?" i glared at him defiantly as he continued. "dead.
Progression
Anyway, mother has a huge library, containing books from all over the multiverse. now, in quite a few of them, there is usually a bunch of so called 'heroes'..." "wait wait wait...you _read?_" cadfael said with mock disbelief "stop making fun!"
No Pants, Only Masks
"look, i know about multiversal boundaries, it'll be fine! it's all quantum and stuff! we need to get going before all the good masks get taken." "so you'll wear a mask but not pants." jak snickered then paused. "what even is a 'quantum?'
Wind of Change: Chapter 35
Of all the bloody things in the multiverse, i got paired with a bloody werewolf hunter? is this a joke?"