Zenithian Equipment
The Zenithia Equipment is a set of critical items in Dragon Quest IV. They are a set of legendary armour and weapons said to be necessary to defeat the King of Hell; they are also the keys to Zenithia, as one must be equipped with all four pieces to open the door to the Tower of Heaven. However, only the Chosen Hero is capable of wearing them, making him instrumental in the overthrow of Esturk and later Saro.
Zenithia Armour
The Armour is likely the first piece to be acquired; it is found in the cave north of the Medal King's Palace.
Zenithia Helm
The Helm is found in Stanciara, 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 Monbaraba to recruit comedian Panon 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.
Zenithia Shield
On a tip from a poet in Stanciara, the party heads to Baturando, only to find that the king lost it to a beautiful woman many years ago. They travel to a small kingdom east of Baturando, 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.
Zentithia Sword
After acquiring the balloon and traveling to the World Tree, they find a fallen Zenithian named Lucia, who points them to the Sword.