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.
Before battle with a Trainer that can use Mega Evolution, the Key Stone accessory is often shown off. For Trainers that use VS sprites (such as Korrina and Diantha), often the Key Stone is clearly visible in the zoomed-in VS sprite. For Trainers that use 3D models (such as Lysandre and Zinnia), the camera often starts by focusing on the Key Stone before zooming out to show the full body. Some Trainers, such as Calem/Serena and Brendan/May, have the Key Stone accessory visible on their 3D model, but not focused on. However, other Trainers, such as Courtney, Matt and the Hoenn Elite Four, don't have visible Key Stones at all. Secret Base Trainers have no visible indication of possessing a Key Stone.
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. Steven gives the Mega Bracelet to the player on Southern Island after LatiosOR or LatiasAS, holding its respective Mega Stone, joins the player.
The player character also wears a special Mega Bracelets during Contests, Brendan's being a Mega Cuff (Japanese: メガブレス Mega Bracelet), black band with a circle of large, connected red diamonds affixed to it, with the Key Stone embedded in the band, while May's is a Mega Charm (Japanese: メガチャーム Mega Charm), a chain of cream bows with the Key Stone embedded into a pink heart charm.
Secret Base Trainer avatars of player characters that have a Mega Bracelet will use it in battle if possible.
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.
- Lisia uses a Mega Tiara (Japanese: メガティアラ Mega Tiara), which is a hair clip she 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.
- Courtney and Matt use Mega Rings during the Delta Episode, which are not seen on their artwork.
- Sidney, Phoebe, Glacia, and Drake use generic Key Stones after the Delta Episode, which are not seen on their artwork.
| Mega Ring
|| Mega Bracelet
|| Mega Cuff
|| Mega Charm
- Mega Ring
|| This ring contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.
|| This ring contains an untold power that somehow enables Pokémon carrying Mega Stones 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 Mega Evolution Special II, it was revealed that he received it from 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. Astrid's Key Stone made a brief reappearance during the intro of Diancie and the Cocoon of Destruction.
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.
In Diancie and the Cocoon of Destruction, a diamond Diancie had created and given to Bonnie earlier caused it to Mega Evolve, acting as a Key Stone.
Mega Evolution Special II 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 the same episode, a giant Key Stone was discovered by Steven and Alain. While Lysandre's scientists were inspecting it, Rayquaza appeared and used the Key Stone's power to Mega Evolve into Mega Rayquaza. Soon after, it disappeared along with the chaos created by Rayquaza's Draco Meteor. The stone reappeared in SS032, along with Mega Rayquaza. It was eventually taken away by Lysandre's submarine.
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
A Mega Bracelet 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, Li'l Kanga, into Mega Kangaskhan. Later, he adds a Manectric, Élec, to his party, who can Mega Evolve into Mega Manectric.
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.
Diantha, Gurkinn and Korrina have decided to travel with each other, during a battle against a criminal who attempted to capture Diancie, the trio Mega Evolved their Pokémon to fight him. By the aftermath Diancie finds their Key Stones interesting before leaving, Gurkinn reveals to the two that Diancie is capable of Mega Evolution.
In the Omega Ruby & Alpha Sapphire chapter, Ruby, Sapphire, and Emerald acquired Mega Bracelets from Ultima and Steven in preparation for another disaster coming to Hoenn. Somewhere on Southern Island, Ruby calls Latias and Latios using the Eon Flute, Latios decides to go with Ruby telling Latias to stay on the Island. Latios reveals to Ruby that they've acquired their respective Mega Stones sometime before he had acquired his Mega Bracelet, whilst still in flight Ruby activates his Mega Bracelet to Mega Evolve Latios. Which they successfully do in PAORAS02.
Zinnia appears with her Mega Anklet at the Sky Pillar with Aster, where she battles Ruby with her Salamence.
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