The armor first appeared in MediEvil, where Daniel obtained it from a dragon in the Crystal Caves. Once it is activated, Daniel's appearance alters slightly to that of a dragon, while he also gains resistance against fire and the ability to breathe fire. The Armour is required to pass through the Dragon Gate in the Gallows Gauntlet. Wearing the Armour in the Japanese version slowly depletes Daniel's health.
In the first game, the early icon for the Armour consisted of a red bottle with a dragon's tail, wings, and head coming ouf of it. This suggest the initial design of Dan's dragon form must have been red in colour, as pictured on the concept art.