Collectibles and completion
Optional discoveries, useful collections and completion goals in Kingdom Hearts II.
Spoiler notice: This guide discusses story progression or late-game content.
Original Kingdom Hearts II; Final Mix and HD collections add or change content.
Treasure chests
Use Jiminy’s Journal to identify missing treasures by world. New movement options can make previously unreachable chests accessible, so record obstacles rather than repeatedly trying the same jump.
Synthesis materials
Keep materials organised by enemy source and rarity. A completed treasure list does not mean the synthesis collection is complete.
Journal challenges
World activities and minigames have their own journal goals. This wiki covers the original release: Final Mix puzzle pieces and later trophy lists should not be mixed into its checklist.
Use the edition note above when comparing a checklist with another release. Story completion, collecting and platform achievements are separate goals.