Rex

Jonathan smith transformed into Rex (we’re back movie) About Rex: Rex is a fairly friendly and highly intelligent dinosaur who spends his free time golfing. Outside of that he loves entertaining children at the Museum Of Natural History in New York City. Rex however wasn't always like this. Prior to being fed Brain Grain cereal Rex was according to him, "stupid and blind." Rex unfortunately is also incredibly trusting to a fault and his loyalty to his friends can be used against him as it was when he ran into Professor Screweyes. Once Rex was force fed Brain Drain he reverted back to his more primal self.