Featured on May 14, 2013. And again on November 29, 2014 more times than I can count thanks to you guys.

Now with our own TVtropes page! Help us catalog the awesomeness.

Holy crap we've got a trailer too!
[youtube=https://www.youtube.com/watch?v=MIguvceYEiY]

MLP:FIM is the property of Lauren Faust
Bleach is the property of Tite Kubo

Plot aspects for chapter thirty six onward contributed and improved by Ketvirtas and Alondro
Chapters 0-88 proofread by xbox432
Chapters 89-onward proofread by LyonAzakura
Partially inspired by Dirty Bit's story Cuatro
Further inspired by Christopher28's story A Different Viewpoint of Equestria
Further inspired by Trinary story Friendship is Empathy
Random plot elements inspired by SwimmingDalek98 and Phoenix Archangel
Story structure and pacing inspired by Tite Kubo

Ulquiorra Cifer was defeated at the hands of a mere human and died in Las Noches. Or at least that's what he thought. In the boundary that separates life and death for all Hollows, he's found by one that finds him interesting enough to give a second chance at life free from Aizen's control, and free to do as he pleases; he was just never told that his second chance of life would take him to an alternate world he never could've imagined even if he tried.

The land of Equestria is a magical place full of hope, and second chances. In this land where friendship is considered the most powerful magic in existence, can the Cuatro Espada find something that's been missing and learn how to live? Or will his presence be the downfall of the peaceful world and all of its inhabitants?

This is a fic based on the Time Loop Files, the format of which was first codified by Innortal on fanfiction.net.
Here's a brief guide.
The basic idea is, one character (the Anchor, usually the main character of a fictional setting) is looping back to the very first moments of their parent series every time either they die or some kind of time limit expires. They of course end up monumentally stir crazy given enough time.
Eventually others start to loop as well.
The reset is not always perfect. Sometimes a loop's history will be different to the "prime" loop, or canonical plot.
"Crossover" or "Fusion" loops also occur, randomly. These can involve the home loopers having a guest, or the anchor for one universe spending time in another, or replacements of one character by another.
Vacation Loops are where the Anchor (or others) decide/s "buck it" and lets off steam by doing whatever comes to mind. There's little or no attempt to maintain the original timeline.

In addition, and particularly more recently, it should be known that this story has a collaborative element to it - people may submit loop ideas or loops, ideally at the Spacebattles thread (a link to the current version of which is on the Trope page), and they may become included.

There's two page image options, thanks to Filraen - the current page image has been edited by the original creator from this work of theirs.. The other one is here:
http://hourglass-vectors.deviantart.com/art/MLP-Loops-466030169