River Styxx was trademarked on January 22, 2014 and her first doll came out in Mid November, 2014. As of January 01, 2015, her doll number totals 1 and makes up 0.29% of the entire Monster High doll collection. Other merchandise of her is not yet available.
Doll: River has has skeletal face and body, and due to this she has no ears or nose. She has purple skin and blue eyes. For makeup, she has light greyish makeup in her eyebrow crease, while also having dark purple eyeshadow. She has thick eyeliner with purple lips. She has acquired bangs for her pink and purple hair. Her lower limbs are transparent with visible bones inside while her higher limbs are opaque skin.
Clothes: She wears an iridescent shimmery dress with a pattern of skullettes and paisley print. She wears a sheer mesh hooded cape.
Accessories: She has a staff with a bow on top and Skullette between that bow. Chains wrap around the staff leaving loose chains to float around. She has a chained bow necklace adorning her neck. On her left hand she has a chain bracelet with a Skullette, but on the right she has a basic bow bracelet. River's transparent boots have fang heels with wrap around chains connecting to a bow with dangling ends. For her belt it cover her waist with chains and a bow. The back part ties the chains into a huge bow with loose chains dangling with charms.
Extras: Has ghost skullette comb with diary. Includes a ball and chain stand.