@Zerowinger  
I thought Twilight Sparkle, Pinkie Pie, Fluttershy, Rarity, Applejack and Rainbow Dash were dressed up as Charlie Brown, Lucy, Violet, Shermy, Schroeder and Pigpen in their Halloween costumes from It’s The Great Pumpkin Charlie Brown, Rainbow Dash was dressed up as Lucy in a witch costume, Rarity was dressed up as Shermy in a Mr. Hyde costume and Twilight Sparkle, Pinkie Pie, Fluttershy and Applejack are dressed up as Charlie Brown, Violet, Schroeder and Pigpen in ghost costumes. Twilight Sparkle was the normal ghost, Pinkie Pie was the dirty ghost, Fluttershy was the too many holes ghost and Applejack was the raccoon hat wearing ghost. I saw them when Sandbar, Gallus, Ocellus, Smolder, SilverStream and Yona arrived at the Nightmare Night Party. I might have noticed that their chaperones are Callie, Marie, Pearl and Marina. Callie was dressed up as a pirate, Marie was dressed up as a ninja, Pearl was dressed up as a vampire and Marina was dressed up as a werewolf. Callie was the Smolder and SilverStream’s chaperone, Marie was Sandbar and Yona’s chaperone and Pearl and Marina were Gallus and Ocellus’ chaperones.

Called it

@bigladiesman  

 
It is also the best dressed version, in my opinion.  
Which could explain why it was the one Rarity went for.  
either that or she just wanted a hat.

My least favourite Mane 6 Pony as my favourite Universal Monster. BOOOOO!

@bigladiesman  
@Masem  
Ohhhhhh.

@Masem  
Yay! Another Universal Monsters fan!  
I still call it Monster Mash (I know, it was a term to design the crossovers, x meets x, House of X, but I love the term so much I still apply it to all Universal horror movies from The Hunchback of Notre Dame to The Creature Walks Among Us).

AJ’s mane though.

@ImperfectXIII  
AKA Quasimodo.

@bigladiesman  
1943, and part of the Universal Monsters “collection” as we call it now.
 

@ImperfectXIII
 
Rarity is dressed as Claude Rains’ 1942 depiction of the phantom, who wore a mask like this and a hat.
 

Dupe, nothing to see here.

@zerowinger66  
You sure? Looks like she’s wearing a whole eye mask instead of a half-mask. Plus, I don’t remember the Phantom wearing a hat.

Totally and utterly fooled.

@Masem  
Ah, it’s true!

@bigladiesman  
Sandbar’s Dracula.

All the Universal monster legends except Dracula. Andy, you pop culture geek you…

@ImperfectXIII  
Appledash shipping confirmed.

@ImperfectXIII  
She’s the Phantom of the Opera.

Twilight: The Hunchback of Notre Dame  
Spike: The Mummy  
Applejack: The Bride of Frankenstein  
Fluttershy: The Wolfman  
Pinkie Pie: The Creature from the Black Lagoon  
Rainbow Dash: Frankenstein’s monster
 
…Not sure who Rarity is.

Looks like Fluttershy is more than happy to join in on the scare.