This randomizer creates a more dynamic play experience by randomizing the locations of most items in Kingdom Hearts 2. Currently all items within Chests, Popups, Get Bonuses, Form Levels, and Sora's Levels are randomized. This allows abilities that Sora would normally have to be placed on Keyblades with random stats. Additionally, there are several options for ways to finish the game, allowing for different goals beyond beating the final boss.
The Garden of Assemblage Mod made by Sonicshadowsilver2 and Num turns the Garden of Assemblage into a “World Hub” where each portal takes you to one of the game worlds (as opposed to having a world map). This allows you to enter worlds at any time, and world progression is maintained for each world individually.
In Kingdom Hearts 2, items which need to be sent to other worlds appear in any location that has a item in the vanilla game. They are represented by the Archipelago icon, and must be "picked up" as if it were a normal item. Upon obtaining the item, it will be sent to its home world.
It is added to your inventory. If you obtain magic, you will need to pause your game to have it show up in your inventory, then enter a new room for it to become properly usable.
When you die in vanilla Kingdom Hearts 2, you are reverted to the last non-boss room you entered and your status is reverted to what it was at that time. However, in archipelago, any item that you have sent/received will not be taken away from the player, any chest you have opened will remain open, and you will keep your level, but lose the experience.
For example, if you are fighting Roxas, receive Reflect Element, then die mid-fight, you will keep that Reflect Element. You will still need to pause your game to have it show up in your inventory, then enter a new room for it to become properly usable.