Where do you find orichalcun in kingdom hearts2?

In Kingdom Hearts II, Orichalcum is a rare synthesis material used to create powerful items. You can find Orichalcum in various locations, including the treasure chests in the game and by defeating certain enemies. Specifically, one of the notable locations is in the Cavern of Remembrance, where it can be found in a chest after completing specific challenges. Additionally, it can also be obtained by completing various synthesis quests.