@Takengrin Endmmar  
Technically, it was her temporal copy, and even then, her mind wasn’t her own due to an onset addiction to magic absorption. X3

@Mildgyth  
…oh..yah..that episode . _.

@Takengrin Endmmar
 
Well, she didn’t become evil, but she did try to use a mind control spell to create a friendship problem she could solve. And we all know how that turned out;
 

@thps48  
What do you mean she became evil once? O-o

@SeraphimDawn  
No, but the pattern of the stars on Twilight’s cutie mark are unique. Additionally, this theory has been around for five years, but the thing is I’m the only person who uses it. lel

@thps48  
Lots of ponies have astrological themed cutie marks, particularly unicorns. Do they have connections to the stars as well?

@Blissey1  
He may have meant “potential for evil”. She’s possibly more powerful than any other alicorn, even as a unicorn, her cutie mark implies a connection to stars, like she may have been assigned to guide all the stars in Equestria’s sky the same way Celestia and Luna do the sun and moon, and her name is kind of evil sounding anyway.
 
Of course, a couple of elements from the last four years have arisen that’d make an Evil Twilight story more difficult now, like Twilight has gained like fifteen evil doppelgängers, and she already became evil once, except it was her interspacial copy. XD

@Background Pony Number 17  
…wat

@SeraphimDawn  
That’s one of the reasons I like Twilight Sparkle and Spike’s scenes together. Despite being the show’s main heroine, Twilight has an evil streak in her a mile wide. Meanwhile, Spike is a truly noble-hearted dragon, running straight against stereotype. Seeing a dragon being the conscience and voice of reason for a unicorn is hilarious.

@Background Pony Number 17  
In MLP FiM lore, unicorns are basically the mages. Granted, most unicorns aren’t adept wizards. But powerful wizards and dragons have been traditionally depicted as mutual companions.
 
There are variations of unicorns or unicornlike creatures in various other mythologies that depict them as not so benevolent creatures. Particularly in Persian folklore. The Shadhavar lures and EATS children.
 
Also, unicorns a lot of times in FiM aren’t exactly the nicest ponies around. They can be pretty snide to downright villainous.

@SeraphimDawn
 
Dragons (western ones, at least) and unicorns are Natural Enemies. The former are symbols of evil and corruption, while the latter are symbols of goodness and purity. So naturally writers pair them up in stories–they’re the classic mythological version of “Opposites Attract”.

I love all these pics of Luna and this dragon.

@SeraphimDawn  
Seeing as Dragons don’t seem to possess too much magic and are sentient, I have doubts about that.

I really head canon that unicorns once tamed dragons in a forgotten distant history.  
Much like a dragon and wizard type of companionship.

@Meanlucario  
I see

@Takengrin Endmmar  
It’s the Spirited Away dragon, so this one is likely based on that dragon more than the one from Neverending Story.

@Meanlucario  
Pic don halp .3.

@Takengrin Endmmar  

Why does that dragon remind me of the dragon from never ending story or something?

@SeraphimDawn  
That’s why I ship Celestia with Discord.

I like the idea of Ponies, mostly magic using unicorns, having dragon companions like Twilight does.