The Tyrannosaurus Rex or T-Rex for short, is a character that makes a cameo at the end of "Ugh," as a "Gift" for Patchy which was given by Potty. He also makes a cameo in "Truth or Square" at the beginning with the other clips of Patchy.
He is a large T-Rex with dark green color on the top of his body and light green on the bottom. His animation moves are very similar to the Bumbles' moves in the Rudolph T.V special.
He first appears in "Ugh" as a "Gift" for Patchy which was given by Potty.
He later appears in "Truth or Square" where the clip of the T-Rex chewing on Patchy is shown.
In full body view when he was shown to Patchy from Potty and when Patchy gets chased by him, he was in stop-motion animation movements.
In close-up view when he was devouring Patchy from the legs, he was a hand puppet which looks exactly like his head.