Forms of Twilight Sparkle

 has, in the course of various adventures and misadventures, taken on a number of different forms.

Fiery
When Twilight Sparkle became frustrated to the point of anger at the inexplicable nature of 's Pinkie sense, she briefly underwent a transformation of sorts. Her mane and tale became fire, her irises and pupils became red, and her fur became white as her Cutie mark disappeared. This state was temporary, lasting only a few seconds, and Twilight soon returned to normal, albeit with minor scorching evident on her mane, tail, and fur and smoke rising off of her.

This form bears some similarities to the Nirik form that Kirin assume when angry.

Twilight Sparkling
Twilight Sparkling is the Vampire Pony form of, assumed in order to battle the Living Apples who sought to conquer.

Personality and traits
Twilight Sparkling is very similar in appearance to Twilight Sparkling but has bat wings, tufted ears, red eyes, fangs, and a white collar held in place with a purple star tie clasp. Her cutie mark also changes so that the large star in the center now features a red apple at its center.