Tales of Equestria
 
Alternate character costumes.

If Rarity is Nightmarity, Fluttershy could be Flutterbat. Pinkie could be Rocky, maybe.

@Background Pony #FC74  
There just isn’t that Halloween spirit.

Is dressing up as another pony legal? Like, if my cousin’s friend was named Brad, I could dress up as that Brad?

I love Dash’s hair alot.

I like this a lot.

@Mooncalf  
Discord is a sadist, which makes him the closest to her opposite.
 
Other than that, she didn’t really have any kind of connection to her opponents.

@Mooncalf  
Nope. No one has a reason to harbor a grudge against Flutters. Unfortunately.

@Sjogre  
Valid points, true.
 
So does Fluttershy have a dedicated antagonist for herself at all? That red dragon kinda lacks character, and Discord… well, he’s a complicated case, you know?

@Mooncalf  
The initial cause of the episode’s conflict was Fluttershy’s shyness. Iron Will himself could have been replaced with a pamphlet.
 
This wasn’t the only episode in the series with no villain, though. Still, something that I liked that episode is that the writers avoided the temptation to make Iron Will a villain. He was a reasonable man that was just doing his job from start to finish. And his job, ultimately, was to help people.
 
If he’d heard about Fluttershy pushing people around, he probably would have tried to get her to stop, when you get down to it.

@Sjogre  
Antagonist in the context that he was the initial cause of the episode’s conflict. Although only with the catalyst of Fluttershy taking things in the wrong direction. And I rather liked the fact that the episode had no clear-cut ‘bad guy’.

he was the antagonist for the episode.
 
Not really, no. He tried to help Fluttershy, just the same as Pinkie Pie and Rarity. Fluttershy’s excessive aggression was not Iron Will’s fault. As Fluttershy herself said, she was the monster. She was the one that was letting her anger get the best of her.
 
Iron Will, by contrast, was always reasonable.

@AppleDashWINS  
Correct.  
Sure, Trixie may have tormented Twilight’s friends specifically, but that’s because they were just that - Twilight’s friends. She was aiming for Twilight all the time. It was personal.
 
Similarly, Gilda was the antagonist to Pinkie - both wanted to have Dash as their friend, but Gilda wanted exclusive rights, while Pinkie knows that sharing is more fun.
 
Fluttershy as Iron Will works. While he’s not really evil, he was the antagonist for the episode. He brought both good changes and bad to her - and the episode ended when she learned to accept the good changes (be more assertive) but rejecting the bad (don’t be a jerk about it).
 
AJ is a bit impersonal, but maybe she has a more storied antagonism against the timberwolves offscreen. The alternative would be to dress like the Flim Flam brothers, and those were less ‘scary’ and more ‘douchey’.

ooh, nitmar rarty!

@Battle GT  
I don’t think that’s the kind of connection mooncalf was talking about lol

@Battle GT  
That was cool XD

@Mooncalf  
Pinkie had her mouth Deleted by Trixie in Magic Duel

@Mooncalf  
And yet, we see Pinkie as Trixie.

@Ryuupony  
Well, not anymore…

Am i the only one who see a taco on Rarity´s head?

@AppleDashWINS  
But Fluttershy has no emotional connection with Gilda, just as Pinkie has none with Trixie. For Fluttershy, Gilda was just yet another scary thing, nothing more.

I actually think Fluttershy should be Gilda. Not even Discord is anymore opposite of flutters than she is  
but if so, I have no idea what to put Pinkie in

Pinkie should have been dressed as Gilda. And Twilight should wear Trixie’s outfit.

I like pinkie with Trixie’s hat and cape

Wouldn’t it make more sense if Fluttershy was dressed up as Discord? Iron Will, after all, was never even an antagonist.