(Woody: Who's Velocistar237) Oh, that's nothing! Just a dinosaur down the street. Lemme just take care of that...just a dinosaur.
Trixie is a character in the 2010 oscar winning Disney/Pixar Toy Story 3. She is a blue toy Triceratops, who appears to be of the same toyline as Rex.
She chats online with someone who goes by the name "Velocistar237" (presumably a Velociraptor toy). She is somewhat scatterbrained and very zany, and helps Woody find his way back to Sunnyside. In the credits, she is seen to become close friends with Rex, as they are often seen together and play on the computer together.