Queen Chrysalis spends the entirety of A Canterlot Wedding, Part 1 and Part 2 disguised as Princess Cadence with her eyes occasionally flashing green and her magic glowing green instead of Cadence's blue.
After she is confronted by the real Cadence, she transforms into a creature that looks like a pony with a twisted unicorn horn, a pair of tattered insectoid wings, and stands as tall as Princess Celestia. Unlike a pony however, she has a pair of fangs and dark green eyes with elongated oval pupils. She has a teal mane and tail, a blue-green chitinous plated over her midsection, and she wears a small, black crown tipped with three blue orbs. Her voice has distorted echo quality, as if two voices were speaking out of sync. Her mane, tail, and legs all have holes, her limbs are very slender. Like other non-pony characters, she has no Cutie Mark.