@when she felt her wings unfold  
So when Discord “Discording” ponies, he’s really just reprogramming them to be the opposite of what they are, hence the discolouring.

@when she felt her wings unfold  
Ah okay.
 
I always imagined Tirek was a reincarnated Devil from The Impossible Planet/The Satan Pit considering the similar appearances.

Handwaving and deus ex machina. Don’t expect any consistency in NuPony.

@when she felt her wings unfold  
That’s a good explanation…and what about Tirek?

@Revan0123  
The Doctor initially concludes that he’s a possibly omnipotent being from the Q Continuum. His companion believes the ponies’ explanation at first, but then discovers, assisted by some of the background ponies, that Discord is an insane but highly intelligent Frankenstein’s rebuild of several of the park’s greeter and guide bioanimatics. He was was created as a kind of god-emperor in the early dark ages after the exodus by a heretical cult of human worshippers. The cult, sadly for their purposes, got the shape wrong, as well as several other rather more fundamental errors regarding choice of leader.
 
The guides he’s patched together from were designed to resemble rather friendly Chinese dragons and could also function as bouncers when necessary. As a result Discord has one of the few remaining telepathic links to the habitation’s security transmat and antigrav cores deep under the bedrock.
 
Anyway, the episode is notable for revealing that Lyra and Bon-bon are a couple like everyone assumed, but let down by some awful comedy bits involving them and the humans that’re just embarrassing for everybody involved (“so, you’re bi…pedal?”, only worse). There’s also a massive ship tease between the Doctor and Celestia, but everybody just expected that.

@when she felt her wings unfold  
How does that explain Discord being able to do all this ‘Teleporting’ and his ‘snapping fingers’ magic?

@when she felt her wings unfold  
 
“That explains it all!”  

@Background Pony #7D4A  
An abandoned late 26th Century human amusement park in a deep-space transit layover, bypassed by new hyperdrive technology like thousands of other attractions.
 
What is now “Equestria” had, and remarkably still has a very convincing small artificial biosphere after a couple of millenia. It was populated by psionically-sensitive biorobots of all shapes and sizes intended to appeal to all ages, so it wasn’t just coincidence or luck that the inhabitants of the Cuddle Pony Planet™ ride took over its maintenance after the humans left and the years of chaos began. The little ponies were after all designed for friendliness, cooperation and intelligence.
 
It has a small private fusion sun and an artificial moon to keep it going, but their orbits have decayed a bit and they need adjusting from time to time. The artificial biosphere is very convincingly designed and self-consistent right down to the bedrock, but there are a few tells such as the artificial nanomolecular transmat-condenser clouds that must be moved around by a specialized weather caste, and ersatz animals with no natural instincts which have to have homes made for them. Much knowledge was lost in the dark ages following the abandonment, and today most ponies are unaware of their origins.
 

 
… but for a hoofful of brave researchers unafraid to question the accepted wisdom, of course!

@Background Pony #270E
 
Played it by ear.

@wildrook  
Nice. Sounds like something that would be said in the show :)

Twelfth Doctor: A TALKING mythological equine! Clara, look at her!
 
Clara: Yes, she’s fascinating. Then again, it is…somewhat tame.
 
Doctor: That’s because she’s one of the few beings that don’t try to kill us on a daily basis. Oh, I’m channeling my ninth face…tenth…hard to tell, but it’s fantastic!
 
Twilight: Can you put me down now? You’re not the first humans I’ve seen.
 
Doctor: Oh, you KNOW about humans! Right…sorry, how do you know about humans? And you’re half-right. Clara’s human. I’m a Time Lord.
 
Twilight: Is that like an Alicorn?
 
Doctor: Somewhat…do they live long lives?
 
Twilight: I know two that have lived a thousand years, and one of them is my mentor.
 
Clara: A peaceful meeting. That, alone, is a near impossibility, but change is good.
 
Twilight: We’ll talk about this if we get the chance, but right now I need to concentrate on getting your box out of the quicksand.
 
Doctor: Right. Save the TARDIS. (puts Twilight down)

Equestria is a low gravity planet, obviously. That’s what allows for the all the megafauna, and flying with such tiny wings.

@Foric  
she’s fluttering her cherub wings vigorously

Dude is strong!

holding ponies :3

Jeremy Clarkson is that you?

holy hell, does he lift or something?

“Fucking massive you are!”