Kingdom Hearts 2: How to Get Items for the Ultima Keyblade

Find the Ultima Keyblade repice. It's located in the Basement Corridor of the Mansion found in Twilight Town. You can't make the Ultima Keyblade until you reach this stage of the game.

Collect one Orichal. They are found in item boxes scattered throughout the game. Some of the worlds you find them in include Twilight Town, The Land of Dragons, Port Royal, 100 Acre Wood and The World That Never Was.

Find a Mythril Crystal. They are found all over the world, including in Agrabah, Pride Land, Radiant Garden and Space Paranoids.

Find one Ravine Crystal. These are dropped occasionally by the Berserker enemy. You can find and defeat him in Twilight Town, Mysterious Tower and The World That Never Was.

Collect one Twilight Crystal. These are dropped by the Sorcerer, who only appears in The World That Never Was.

Collect four Mystery Crystals. These are dropped by the Sorcerer, the Berserker and the Samurai, the last of whom appears in the Mysterious Tower.

Collect seven Orichalcums. These are scattered throughout the game world, and are often found in item boxes and awarded for clearing levels.

Bring all of the items to a Moogle Shop for synthesis.

Apply the Suffusive Crystal to reduce the number of required elements for the recipe. This is a necessary item for creating the Ultima Keyblade. The Suffusive Crystal is dropped by the Shaman in Pride Land and by the Book Master in Space Paranoids.

Use the items to synthesize the Ultima Keyblade, the most powerful weapon in "Kingdom Hearts 2."