@TheAntiCat  
the simplest explanation is the best; laziness. like making your phone transport people to an empty white broom closet because magic for some never explored reason.

@TheAntiCat  
Not so much a conspiracy theory as an allegedly-humorous dig at the fact that this whole franchise is meant to sell toys.  
Except the bit about Vignette not having a transformation because she thinks she’s already perfect. I’m sticking to that. All the characters who transformed thought they were missing something, that something about themselves wasn’t right. Vignette and Wallflower, on the other hand, thought the problem was other people.

@Bitt_Player  
Or maybe they realized they’ve used the same formula a few too many times.
 
Just because you have a conspiracy, doesn’t make it real or accurate. The simplest explanation is often the best.

Because she thinks she’s already perfect.  
That’s my headcanon and I’m sticking to it.  
It’s definitely not because Hasbro’s toy designers didn’t come up with an alternate form for her in time. Nope. Not in the slightest.

@Glimmer74  
…Who?

Be yourself  
but better  
by yourself  
stay away from me!

@Glimmer74  
What about her?
 
That fits with her.

@3D User  
Fair enough.

@Glimmer74  
Who?

@Glimmer74  
Invisible…

@Background Pony #B565  
What about Wallflower?

Equestria Girls Villains Top-List.  
On the 1st place, The Dazzlings.  
On the 2nd place, Sunset Satan.  
On the 3rd place, Midnight Sparkle.  
On the 4th place, Gloriosa Everfree.  
On the 5th place, Juniper Monstar.  
And on the Last place, Vignette Valencia.

Her monster form is her ego. Besides Blush doesn’t have one.

Bring Your Best Booze

Be yourself but sexier.