RWBY Rex

t RWBYsaurus (or RWBY Rex) is a recurring, non-canon character originally featured in Monty Oum's Twitter feed photos.

Appearance
RWBYsaurus appears as a small, to large sized dromaeosaur, with a beige coloration, and deep green eyes. It has a bulky body, with a light underbelly, and long, spindly fingers, each tipped with a large claw.

Much like other members of the Raptor family, this dinosaur has the famous "Killing Claw" that is so well known with the specific species.

Debut
RWBYsaurus' debut was on Monty's Twitter feed, when he posted an image of Ruby Rose and Weiss Schnee riding a dinosaur, joking that he had been awake for too long. RWBYsaurus has subsequently appeared in several similar tongue-in-cheek scenarios:
 * As a waiter serving Ruby, Weiss and Blake at a diner (following the release of the "Black" Trailer).
 * As the lead singer of a band also featuring Team RWBY (following the release of the "Yellow" Trailer).
 * As Batman, alongside Weiss who is apparently playing the role of the Joker, in reference to the Christopher Nolan film The Dark Knight.
 * In a parody of the Coppertone sunscreen advertisement, pulling at Jaune's pajamas.
 * During the RTX premier of Episode 2, for a single frame, where a visual effect and a sound effect were missing, along with the text "VFX Missing," as a joke by the animators.
 * When Penny shoots down the two Bullheads in Black and White, Rex can been seen falling from the right-hand Bullhead. This was brought to light after Monty mentioned that Rex was hidden in an Easter Egg in the show, and later confirmed by Gray Haddock.
 * In the background of some work-in-progress footage of Volume 2 featured in the first RWBY Production Diary.

Trivia

 * In the band picture, the name "RWBY Rex" is written on Yang's drums; this may be the official name for RWBYsaurus.
 * The size of RWBYsaurus has varied widely between his appearances; in its first few artworks it was large enough for two of the girls to ride like a horse, but in the picture with Jaune Arc it appeared about the size of a small dog.
 * Contrary to the coined "Rex" suffix, the dinosaur's character model appears to look similar to the dromaeosaurid dinosaurs known as Utahraptor and Deinonychus, which were only very distantly related to Tyrannosaurus Rex.