Robin's Parasitic Twin

Robin's Parasitic Twin is described by Starfire and revealed to be real by Robin. He appears in the episode, The Mask.

History
He is not revealed until at the very end of the episode "The Mask", Robin tried his best and succeeded in hiding his true face, along with his parasitic twin from the Teen Titans. How Robin acquired this parasite is not known, but it is shown he and the parasite get along very well, sharing laughs, and foods.

Episode Appearances
The Mask (debut)

Trivia

 * The parasite is not present in Driver's Ed when Robin was taking his eye exam, and instead he had black dots for eyes.
 * It's possible that Robin acquired this parasite sometime later, or the dotted eyes was another mask.
 * Robin's Parasitic Twin is able to fit perfectly underneath Robin's mask without any noticeable bulge.
 * Alternatively, he may of been hiding deep in Robin's socket, or the mask's structure is specially designed to give the smooth appearance.
 * Robin's twin doesn't more than likely doesn't exist as instances cannot be taken too seriously within the theme of the show.