The Phoenix Armor is one of the four elements of the Hyribead hidden on the planet of Cronos. It renders the wearer invulnerable.
Machine Robo: Revenge of Cronos cartoon
The Phoenix Armor was in the possession of the reclusive Amber Man. The Gyandlar captains Garudi and Diondra attempted to trick Amber Man in order to kill him and take the Armor for Gadess. After Rom Stol and his friends persisted in trying to save Amber Man despite his misanthropic behaviour towards them, he offered them his friendship and the Armor.Save Amber Man, Blazer Cannon! Grujios attempted to steal it and the Dragon Helmet from the Battle Base using the possessed bodies of Harley Robo and then Leina; Rom Stol was able to knock the Dragon Helmet from his hands, though the Gyandlar escaped with the Armor. Close Call, Land Commander 5! However, a second raid by Grujios was more successful,Baikanfu - Cry of Anger! and he was able to get the Armor to Gadess, giving the Gyandlar commander complete access to the Hyribead. Mighty Fortress, Heavenly Sword - Jet Don't Die! However, Rom was able to vanquish Gadess by combining his Wolf Sword with the Star Sword of his brother Guardi, taking back the four Hyribead elements - which he then used to restore Cronos. The Final Battle of Cronos