From Bulbapedia, the community-driven Pokémon encyclopedia.
- If you were looking for the item that Spiritomb is bound to, see Odd Keystone.
A Key Stone (Japanese: キーストーン Key Stone) is a stone that acts as a medium between a Pokémon Trainer and a Pokémon holding a Mega Stone in order to make them Mega Evolve. A Key Stone is typically embedded in a personal accessory. When the Key Stone is activated, the Pokémon's corresponding Mega Stone reacts to it, starting the process.
Key Stone accessories
A Key Stone can be inserted in various objects so that it can be kept on the owner's person. Many characters use different objects to hold their Key Stones.
Player character accessories
Pokémon X and Y
In Pokémon X and Y, the player characters hold their Key Stones in a Mega Ring (Japanese: メガリング Mega Ring), a large black bracelet that Calem and Serena wear on their left wrist.
The possession of one Mega Ring is offered to the player and each of his or her friends, who have to pick the most deserving out of their group. The selection is quickly whittled down to two people: the player and Serena or Calem (depending on the gender of the player). Upon defeating their rival, the player must obtain the Rumble Badge at the Shalour Gym and then go to the top of the Tower of Mastery to receive the ring from Korrina.
After the player has beaten their rival in Kiloude City, Professor Sycamore will upgrade their Mega Ring at the Anistar Sundial by having the player touch the sundial. Once upgraded, the player can then find hidden Mega Stones around Kalos from 8:00 PM to 9:00 PM.
Pokémon Omega Ruby and Alpha Sapphire
In Pokémon Omega Ruby and Alpha Sapphire, the player characters hold their Key Stones in a Mega Bracelet (Japanese: メガバングル Mega Bangle), a large white bracelet that Brendan and May wear on their left wrist. They also wear special Mega Bracelets during Contests, May's being a chain of cream bows with the Key Stone embedded into a pink heart charm, while Brendan's is a black band with a circle of large, connected red diamonds affixed to it, with the Key Stone embedded in the band.
Non-player character accessories
Many non-player characters use different items to carry their Key Stones than the player characters do.
- Lysandre's Mega Ring (Japanese: メガリング Mega Ring) takes the form of a silver ring that he wears on the middle finger of his left hand.
- Korrina uses a Mega Glove (Japanese: メガグローブ Mega Glove), which is a white glove she wears on her left hand.
- Diantha uses a Mega Charm (Japanese: メガチャーム Mega Charm), which is a gold pendant she wears on her neck.
- Steven Stone uses a Mega Stickpin (Japanese: メガラペルピン Mega Lapel Pin), which is a pin he wears on the lapel of his jacket.
- Maxie uses Mega Glasses (Japanese: メガメガネ Mega Glasses), which is a pair of glasses he wears.
- Archie uses a Mega Anchor (Japanese: メガイカリ Mega Anchor), which is a golden, anchor-shaped necklace he wears.
- Wally uses a Mega Pendant (Japanese: メガペンダント Mega Pendant), which is a pendant he wears.
- Zinnia uses a Mega Anklet (Japanese: メガアンクレット Mega Anklet), which wraps around her right ankle.
- Mega Ring
|| This ring contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.
- Mega Bracelet
|| This cuff contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.
In the anime
The Mega Ring in the anime
In the main series
In Mega Evolution Special I, Alain is seen wearing a Mega Ring similar to that of the protagonists of Pokémon X and Y. He uses it to Mega Evolve his Charizard into Mega Charizard X. In SS031, it was revealed he received it in an encounter with Lysandre.
In the same episode, Astrid was shown wearing her Key Stone as an earring on her right ear, while Remo had his Key Stone embedded into the tip of the umbrella that he carries with him. Siebold, a member of the Kalos Elite Four, was seen wearing his Key Stone in his necktie.
In The Bonds of Evolution!, Diantha tapped into the power of her Mega Charm to Mega Evolve her Gardevoir, giving it the power to break free from Team Rocket's clutches.
In Mega Revelations!, Korrina was shown wearing her Key Stone in her Mega Glove, having received it from her grandfather. However, her Lucario lacked the Lucarionite, meaning that she wasn't able to use it yet. After obtaining a Lucarionite in The Cave of Trials!, she became able use her Key Stone to Mega Evolve her Lucario.
Another Key Stone appeared in The Aura Storm!, under the ownership of Gurkinn, who uses it to Mega Evolve his own Lucario. Similar to Korrina, he wears it in a glove on his left hand.
A Key Stone possessed by Mabel appeared in The Bonds of Mega Evolution!. Embedded in her walking stick, she uses it to Mega Evolve her Mawile into Mega Mawile.
SS031 featured Steven and his Mega Stickpin. Alain was able to recognize the Key Stone on the Champion's person, leading him to challenge Steven to a battle.
In Pokémon Origins
In File 2 - Cubone, after helping drive off driving Team Rocket out of the Pokémon Tower and helping the ghost of Marowak find peace, Red receives a Key Stone and a Charizardite X from Mr. Fuji. The Key Stone and Mega Stone activated in File 4 - Charizard during Red's showdown with Mewtwo, Mega Evolving his trusted starter Pokémon, Charizard, into Mega Charizard X and giving them the strength to weaken Mewtwo so that Red could catch it. This Key Stone was not worn in any accessory.
In the manga
A Mega Ring in the Pokémon Adventures manga
In the Pokémon Adventures manga
In the X & Y chapter, X was given a Mega Ring with a Key Stone inside from Gurkinn as a child. With it, he can Mega Evolve his baby Kangaskhan, Kogaru, into Mega Kangaskhan.
In Santalune City, Korrina arrived to help X and his friends battle Team Flare by using her Mega Glove to Mega Evolve her Lucario into Mega Lucario.
In the Tower of Mastery when Essentia attacks Gurkinn, he retaliates by using his Key Stone to Mega Evolve his Heracross to Mega Heracross.
At Lysandre Café in Lumiose City, Diantha shields Y and her friends from Lysandre's Pokémon by using her Mega Charm to Mega Evolve her Gardevoir into Mega Gardevoir.
In other languages
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Reason: Spanish Mega Pendant.