Dragon Quest IV
The Armour is likely the first piece to be acquired; it is found in the cave north of the Medal King's Palace. It the original NES version it reduces breath attacks by 1/3rd, while in the remakes it raises resistance to instant death while reducing spell damage (save for zap) by 1/3rd. In all versions it has a defence value of +70.
The Helm is found in Canalot, in its king's possession. He holds a competition stipulating that anyone who can make him laugh will win the Helm. The party travels to Laissez Fayre to recruit comedian Tom Foolery to the cause, expecting him to unleash one of his funniest jokes on the king; instead, he delivers an impassioned speech about evil on the rise and then necessity of the Chosen to defeat it. The king is convinced and gives up the Helm. It increases the Hero's defence by 30 in all versions, and provides a high resistance to fuddle, snooze, and paralysis in the remakes. In the original, is grants no such protection.
On a tip from a poet in Canalot, the party heads to Burland, only to find that the king gave it away to the queen of Femiscyra (a beautiful woman) many years ago. They travel to a small kingdom east of Burland, however, and after being accused of robbery, they are tasked with finding the real criminal if they want to clear their names. They successfully track down the real robber, clear their names, and are rewarded with the Shield for their hard work. The shield increases the Hero's defence by 55 and casts bounce when used as an item in battle. In the remakes, it reduces the power of breath attacks by 30 points.
After acquiring the balloon and traveling to the World Tree, they find a fallen Zenithian named Orifiela, who points them to the Sword. It has a base power of 65 when first acquired. After speaking with the Zenith Dragon, the ancient guardian will empower the sword to 110. Using it as an item in battle casts Disruptive Wave.
Dragon Quest V
The sword was already located by Pankraz sometime before the start of the game. He left it in a cache in the Whealbrook Adit, which his son later recovered. The sword's power has not changed, and it will cast Disruptive Wave when used as an item.
The shield came into the possession of Rodrigo Briscoletti, who is willing to give it to any suitor that takes his daughter Nera's hand in marriage. Regardless of whom ends up being chosen as the bride, though, Mr. Brisccoletti gives the hero the shield. It improves defence by 60 this time, reduces breath damage by 15 points, and casts Bounce when used in battle.
The helm is being kept in a vault at Helmunaptra by Queen Cleohatra, who is awaiting the arrival of the legendary hero. It improves defence by 50.
Dragon Quest IX
Several pieces of "Zenithian" gear exist as rewards from legacy bosses, however these are costumes of both the male and female versions of the Chosen Hero of Dragon Quest IV, and are appropriately gender restricted (except for the helm and gauntlets, which are unisex):
- Zenithian boots
- Zenithian clothes
- Zenithian gauntlets
- Zenithian helm
- Zenithian leggings
- Zenithian leotard
- Zenithian clothes
- Zenithian trousers