Kingdom Hearts II Final Mix
New costume modifications, known as Crowns, are unlocked by obtaining Proofs. These are equipped on Sora automatically and are present at all times, except during cutscenes and while Sora is in a world-specific costume. There are several types of crowns; possessing one Proof grants Sora a Copper Crown, two a Silver Crown, and all three a Gold Crown. The Proof of Connection is obtained by defeating the Lingering Will, the Proof of Nonexistence is rewarded after defeating all of Organization XIII's Replica Data, and the Proof of Peace is given after appeasing the entire Mushroom XIII.
Kingdom Hearts χ
In Kingdom Hearts χ, crown accessory items are monthly ranking rewards for events and the Dark Corridor Trials, they are named after the zodiac. Four variants are available: Gold, Silver, Bronze and finally "Charm", which is actually a hair decoration and not a hat like the rest.
Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-
Bronze, silver, and gold tiaras can be earned as part of the Wardrobe system.
Kingdom Hearts III
Added in update 1.04 on April 23, 2019, the Proof of Promises is obtained by photographing all 90 Lucky Emblems while the Proof of Times Past is obtained by completing Critical Mode.
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