Treasure items are located in each of the 16 story levels only. There are 64 total; four in each level. While some can be obtained while playing Story mode, it is suggested waiting until Free Play to collect them since specific character abilities are required to gather them all. When one is uncovered, they will glow yellow. Press to pick them up and it will be automatically added to your inventory. Equipping them often gives hilarious results.
Treasure items are one of the necessary objects in the game for obtaining Mithril bricks via fetch quests (white question marks). Refer to “Ever “The People’s Champion”” for more information about quests.
NOTE: If you have the Treasure Item Detector red brick turned on, it's currently glitched. You have to turn it on and off every time you get to a cut-scene in a level for it to properly work.
100% Free Play Collectible Guide: