So in the debug menu there's options to get all items/weapons/etc and under polearms in the main game there's a placeholder name that gives Noctis an airstep sword to use as a spear by holding it by the blade lol this carries over into Comrades where, even more curiously, there's a placeholder name under maces that gives your glaive one of the pillars from Episode Gladio XD
EDIT: Also in the main game there's an accessory called Ring of the Lucii that gives Noct something like 3000 attack and defense, has the same item description as the weapon version
EDIT: Also in the main game there's an accessory called Ring of the Lucii that gives Noct something like 3000 attack and defense, has the same item description as the weapon version