In Kingdome Hearts, the treasure is numbered according to the game menu but is not found in the same sequence order. It will appear at different places when you progress through the game naturally.
Treasure number 20 appears first in the story. It is known as Huddled Isles. It is found to the left of the first save point after getting the access to exploration.
After that treasure number 24 appears in the story. It is called Thebes. After you run into Disney ne’er-do-wells, you will find it next to the save point.
Here are some interesting queries that you might generally have. Hope this helps!
Number of Treasure Chests in KH3
Wondering how many treasure chests are there in KH3? There are a total of 358 Collectible Locations in the KH3. Quite many, right?
How do you get chest 15 in Arendelle?
Treasure #15 – One of the tricky treasure chests is Arendelle. So how to get there? First of all, spin the crystal pillar in the room on the path that is towards your left. You will reach till here from Lucky Emblem. Then climb onto the grinding rail and keep running towards the hall. Lastly, after covering up half the distance, there will be another rail right above the previous one. Hop on! And there you have it.
What is gummi phone?
After you beat the first planet, you will unlock the gummi phone. You need this to keep a track of everything.