Princess Dark Matter is an evil girl who is half demon and a replica of Megan Williams. She has the power to absorb the cutie marks, and shape-shift into any person.
Trivia
She will be the main antagonist of Tino's Evil Valentine Girl. She's also in love with Tino Tonitini. But she was kill by Sunset Shimmer, when she blew her up.
Gallery
Dark Matter (Disguise as Megan Williams)
Dark Matter (1st Form, Absorb Applejack's Cutie Mark)
Dark Matter (2nd Form, Absorb Rarity's Cutie Mark & her magic)
Dark Matter (3rd Form, Absorb Pinkie Pie's Cutie Mark)
Dark Matter (4th Form, Absorb Fluttershy's Cutie Mark)
Dark Matter (5th Form, Absorb Rainbow Dash's Cutie Mark)
Dark Matter (Final Form, Absorb Twilight's Cutie Mark & her alicorn magic)