Treasure Chest
Treasure chests are small objects that can contain different prizes when opened.
The Green chests contain HP prizes which refill the HP Gauge.
The Orange chests contain attack prizes which refill the Special Attack Gauge.
The Red, Blue, and Purple chests contain Prize Boxes that give Medals or Rare Materials. They may also be a Pretender that will attack and need to be defeated instead.
Pretenders can be identified by these two methods:
-They are invisible during fights with other enemies.
-They load after the quest starts with a purple cloud.
Though not a chest there are sparkling icons which will give common materials depending on the world you are in.