This is an unoffical sequel to Puny Purple Pony, written with permission from The Conflicted Writer,

Twilight attempts to open portals to other worlds, including the one of the Big Ponies, in order to see how much better she can do this time round.

However, a misstep and a tripping over a certain Chaos master's tail lands Twilight back in the Big Ponies' world, but will she be able to return as soon as she had last time and what will she discover in this world that is tied to her destiny?

Teen for possible violence later. slice of life is meant to include adventure because of a little exploring later down the track and romance is because of the two Big Ponies Twi knows.

Images from here and here.

Featured on 25/4/2014

The Sky Army leaders have a talent for getting into trouble,but now they've really done it. An accident leaves them stuck in a world of pastel colored equines, and they find that the only way out is through an ancient ponytale that no one can even confirm is true. Reluctantly, they agree to stay and see what will happen, and new friendships are born. But soon, a terrible accident occurs, and the group finds themselves in the heart of the blame. Taking a path that no one could have predicted, they discover a traitor, solve an ancient conflict, and go on a journey that will take them all across Equestria-and maybe even the beyond.

What does a person do when they have served their purpose? What does a person do when they don't even have the right to be?

Liliandra Deathstrike found only a small amount of peace at the fall of the Lich King, still plagued by the images and the memories of all that had happened years ago. But when she finds herself stuck in the Frozen North that is clearly not that of Northrend, those memories only grow more and more as she ponders on her own past, slowly gnawing away at her sanity.

And her new "friend" is enjoying every last bit of it...

It's not every day that a person in the middle of war gets his few moments of respite, but for a veteran blood knight, he gets more than a few moments.

Gai'vahros has had his fair share of experiences when it came to going to other lands and even other worlds, but when he's thrown from the war-torn continents of Azeroth to the happy, peace-loving land of Equestria with no way back, he knows that he'll have to learn to adapt to this place as best as he can or die trying -- and no amount of bubble-hearthing will save him.

As Ash trains his champion team, he finds a glowing dish on the top of a mountain. He touches it of curiousity and ends in a new world with talking ponies who can either perform magic, fly or neither of those two. Two special beings can do both.
What will he do in this new world? Will he find a way home? Will he get stuck forever or even want to go home?

Both Link and Epona race to fight evil once again, however once they make it to the thing that is behind all the monsters that roam Hyrule, they get a big surprise. Once again, Equestria is threatened by evil and Link is once again called to the line of duty. Isn't he?
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[NOTES]
I will add tags as I go along.
Cover image was made by Aeroflyte on DeviantArt, which can be found here, go check him out.
Now edited by these people: m2pt5 and Crescent Quills!
Based off of the Ocarina of Time timeline (which includes Majora's Mask), but takes a few aspects from Twilight Princess.
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Percy Jackson and Annabeth Chase have gone through a lot. They fought the Minotaur, Medusa, a Manticore, the Chimera, Kronos, and even Arachne, the Spider Queen. It was during this last fight that they recovered the Athena Parthenos, a sacred statue that would help secure the demigods' victory over Gaea and the Giants, but the unexpected happened: the floor gave away, and the pair fell all the way down to Tartarus. The first thing they noticed, was that a large mirror, that no monster would approach, not even for some tasty demigod blood. They were trapped, and the only way to save themselves, was through that mirror. What was on the other side, however, was even wilder than they ever thought possible.

(Added romance tag and made story "Teen" for planning on future chapters, and romance mostly in post-story Extras section.)

(Being a big Percy Jackson & The Olympians fan, I couldn't help but notice that Tartarus existed in Equestria, according to Twilight. This story recounts the events of Percy and Annabeth's journey into the other side of the Pit, and beyond.)

This story is a sequel to My Little Pony: Red Version

When Giovanni steals a time capsule and modifies it to take him back to a specific point in time, stealing a small portable storage system device called a Pass(that may or may not be used to travel to the MLP universe), it is up to Blue to find him and stop him from trying to capture the ponies and sell them for profit.

And when there's a chance to capture a legendary, it's win win. Plus, Blue knows if he didn't join Red to travel back in time, he would miss out on the chance to get his own rare pony Pokemon. (That Red managed to get one of but he didn't)

That...And Giovanni has stolen all the badges that belonged to Blue's gym.

Again...

Blue is planning on getting a Pokemon-proof safe once this is all over.

This story is a sequel to High Maintenance Alicorn Fillies and You.

While Celestia was defending Canterlot from Chrysalis, one of her spells hits a mirror and splits into four, hitting her, Luna, Discord, and Queen Chrysalis. Cadence arrived on the scene, and now is the mother of four, very powerful foals.

Having no idea how to handle babysitting Changelings, or Draconequus, she leaves Shining Armor to watch over the Crystal Empire and heads to Ponyville to ask six very important ponies what to do.

I mean, a spell that got divided between four can't be permanent, can it?

Twilight cast a spell and got herself turned into a filly. Luna has tricked Celestia into believing there is no cure, and now as Luna tries to 'find a cure' Celestia has to look after Twilight the Alicorn; filly version. And heaven knows Alicorns are not born often for a reason.

Traducción Española: https://www.deviantart.com/spaniard-kiwi/art/Potras-alicornio-de-alto-mantenimiento-y-tu-990270118