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- "A gem emanating a strange vitality. Give it to the Fairy Godmother."
- —The summon gems' item description.
Summon Gems (召喚石 Shōkanseki , lit. "Summon Stones") are special items that appear in Kingdom Hearts. They each contain the heart of a creature that had escaped its homeworld's destruction. They can be awakened by the Fairy Godmother at the Magician's Study at Traverse Town, unlocking the characters as summons when done so. The four gems contain the hearts of Simba, Dumbo, Bambi, and Mushu. The only summons that are not obtained from a gem are Genie and Tinker Bell, who are unlocked after sealing Agrabah's and Neverland's Keyholes, respectively.
After the Heartless were unleashed and devoured countless worlds, a handful of hearts escape destruction of their individual homeworlds by living on as summon gems. Simba is capable of doing so owing to his powerful heart; Dumbo due to his strong, pure soul; Bambi thanks to his innocence; and Mushu because of his determination.
The Summon Gems are scattered across the worlds, but Sora retrieves them all during his travels. Once awakened by the Fairy Godmother, those contained in the gems assist Sora in his journey. Following Ansem's defeat, the hearts return to their own worlds.
Daichi no Kagayaki , lit. "Earth's Brilliance")
|Received from Leon at the Secret Waterway
Mizu no Kagayaki , lit. "Water's Brilliance")
|Chest in the Mouth
Shizen no Kagayaki , lit. "Nature's Brilliance")
|Complete Pooh's Hunny Hunt
Honō no Kagayaki , lit. "Fire's Brilliance")
|Defeat Dragon Maleficent