Materials
The master list of Keyblade upgrade items.
Ores
Gold Ore (金の原石)
Gold Ore is a common item used in upgrading Keyblades. It's most reliably found in the Mines in the Dwarf Woodlands.
Silver Ore (銀の原石)
Silver Ore is a common item used in upgrading Keyblades. It's most reliably found in the Mines in the Dwarf Woodlands.
Iron Ore (鉄の原石)
Iron Ore is a common item used in upgrading Keyblades. It's most reliably found in the Mines in the Dwarf Woodlands.
Copper Ore (銅の原石)
Copper Ore is a common item used in upgrading Keyblades. It's most reliably found in the Mines in the Dwarf Woodlands.
Underworld Stone (冥界の石)
Underworld Stones are used in upgrading the Olympia Keyblade. It's most reliably found in the Underworld in Olympus Coliseum.
Plants
Curative Flower (薬草の花) Curative Flowers are used to upgrade the Starlight and Treasure Trove Keyblades, and are most often found in the Dwarf Woodlands.
Curative Leaf (薬草の葉っぱ) are used to upgrade the Starlight and Treasure Trove Keyblades, and are most often found in the Dwarf Woodlands.
Curative Bulb (薬草の球根)
Curative Bulbs are used to upgrade the Starlight and Treasure Trove Keyblades, and are most often found in the Dwarf Woodlands.
Strange Leaf (おかしな葉っぱ)
Strange Leaves are used to upgrade the Lady Luck Keyblade, and are most often found in Wonderland.
Strange Bulb (おかしな球根)
Strange Leaves are used to upgrade the Lady Luck Keyblade, and are most often found in Wonderland.
Forest Mushrooms (森のきのこ)
Forest Mushrooms are used to upgrade the Starlight and Treasure Trove Keyblades, and are most often found in the Dwarf Woodlands.
Liquids
Spring Water (きよらかな水) Spring Water is used to upgrade the Starlight and Treasure Trove Keyblades, and is most often found in Daybreak Town and the Dwarf Woodlands.
Swamp Water (沼地のわき水)
Swamp Water is used to upgrade the Treasure Trove and Olympia Keyblades, and is most often found in Daybreak Town and the Dwarf Woodlands.
Underworld Water (冥界の水) is used to upgrade the Olympia Keyblade, and is most reliably found in the Underworld in Olympus Coliseum.
Teardrops (涙のしずく)
Teardrops are used to upgrade the Starlight, Lady Luck and Olympia Keyblades, and are most often found in Wonderland.
White Flower Dew (白い花のつゆ)
White Flower Dew is used to upgrade the Lady Luck Keyblade, and is most reliably found in Wonderland.
White Flower Nectar (白い花のみつ)
White Flower Nectar is used to upgrade the Lady Luck Keyblade, and is most reliably found in Wonderland.
Other
Agate Ring (めのうのリング) Agate Rings are used to upgrade the Three Wishes Keyblade, and are most often found in Agrabah.
Topaz Earring (トパーズのピアス)
Topaz Earrings are used to upgrade the Three Wishes Keyblade, and are most often found in Agrabah.
Scarab Brooch (スカラベのブローチ)
Scarab Brooches are used to upgrade the Three Wishes Keyblade, and are most often found in Agrabah.
Broken Biscuit (お菓子のかけら)
Broke Biscuits are used to upgrade the Starlight, Lady Luck and Olympia Keyblades, and are most often found in Daybreak Town and Wonderland.
Ember (残り火)
Embers are used to upgrade the Three Wishes, Olympia, and Treasure Trove Keyblade, and are most often found in Agrabah and Daybreak Town.
Underworld Flame (冥界の炎)
Burnt Coal (燃えつきた炭)
Burned Coals are used to upgrade the Three Wishes Keyblade, and are most often found in Agrabah.
Scorching Sand (熱をおびた砂)
Scorching Sand is used to upgrade the Three Wishes and Olympia Keyblades, and is most often found in Agrabah.
Starry Sand (星のかたちの砂)
Starry Sand is used to upgrade the Three Wishes Keyblade, and is most often found in Agrabah.
Mythril
Mythril Shard (ミスリルのかけら)
Mythril Stone (ミスリルのしずく)
Mythril Gem (ミスリルの魔石)
Mythril Crystal (ミスリルの結晶)
Orichalcum (オリハルコン)