Rex Deadman (レックス・デッドマン, Rekkusu Deddoman) is a Tyrannosaurus rex-themed Deadman that was accidentally created from Hiromi Kadota using the Rex Vistamp when he tried unsuccessfully to transform using the Revice Driver. The Rex Deadman was accidentally created by Hiromi Kadota when he used the Rex Vistamp in an attempt to transform using the Revice Driver. Instead, the devil went berserk and rampaged alongside the Mammoth Deadman. It was finally destroyed by Kamen Rider Revi's Rex Stamping Finish