View source for Key Stone

{{samename|item that {{p|Spiritomb}} is bound to|Odd Keystone}}
{{ItemInfobox/head
|name=Key Stone
|jname={{tt|キーストーン|Kī Sutōn}}
|jtrans=Key Stone
|sprite=Key Stone SM
|sprite2=Key Stone
|art=None
|gen=VI
|colorscheme=Key items
}}
{{ItemInfobox/BagRow|VI|Key items}}
{{ItemInfobox/BagRowBottom|VII|Key items}}
|}
A '''Key Stone''' (Japanese: '''キーストーン''' ''Key Stone'') is a [[Key Item]] introduced in [[Generation VI]], which is used to allow a {{OBP|Pokémon|species}} holding a [[Mega Stone]] to [[Mega Evolution|Mega Evolve]]. Starting from [[Generation VIII]], it is unobtainable.

When the Key Stone is activated, the Pokémon's corresponding Mega Stone reacts to it, starting the Mega Evolution process. {{pkmn|Trainer}}s often keep their Key Stone inside a personal accessory, such as a [[Mega Ring]], [[Mega Bracelet]], [[Z-Ring]], or [[Z-Power Ring]], though there are exceptions to this.

==In the core series games==
===Player characters===
====Pokémon X and Y====
{{main|Mega Ring}}
In {{g|X and Y}}, the player characters hold their Key Stones in a [[Mega Ring]], a large black bracelet that {{ga|Calem}} and {{ga|Serena}} wear on their left wrist.

The possession of one Mega Ring is offered to the player and each of their friends, who have to pick the most deserving out of their group. The selection is quickly whittled down to two people: the player and {{ga|Serena}} or {{ga|Calem}} (depending on the gender of the player). Upon defeating their rival, the player must obtain the {{badge|Rumble}} 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 City|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====
{{main|Mega Bracelet}}
In {{g|Omega Ruby and Alpha Sapphire}}, the player characters hold their Key Stones in a [[Mega Bracelet]], a large white bracelet that {{ga|Brendan}} and {{ga|May}} wear on their left wrist. {{Steven}} gives the Mega Bracelet to the player on [[Southern Island]] after {{p|Latios}}{{sup/6|OR}} or {{p|Latias}}{{sup/6|AS}}, holding its respective Mega Stone, joins the player.

The player character also wears a special Mega Bracelet during {{pkmn|Contest|Pokémon Contest Spectaculars}}, Brendan's being a '''Mega Cuff''', a 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''', a chain of cream bows with the Key Stone embedded into a pink heart charm.

{{tc|Secret Base Trainer}} avatars of player characters that have a Mega Bracelet will use it in battle if possible.

====Pokémon Sun, Moon, Ultra Sun, and Ultra Moon====
In [[Generation VII]], after becoming the {{pkmn|Champion}}, the player receives a '''Key Stone''' from [[Sina]] and [[Dexio]] at [[Ancient Poni Path]]{{sup/7|SM}}/[[Poni Plains]]{{sup/7|USUM}} after defeating Dexio. They hold their Key Stone in their [[Z-Ring]]{{sup/7|SM}} or [[Z-Power Ring]]{{sup/7|USUM}}.

====Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!====
In [[Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!]], the player receives a '''Key Stone''' from {{ga|Blue}} at [[Professor Oak's Laboratory]] in [[Pallet Town]] after earning seven [[Badge]]s and meeting {{ga|Trace}} in front of the [[Viridian Gym]]. They do not hold it in any accessory and it does not show up on the player's models.

===Non-player characters===
Many non-player characters keep their Key Stones in special items, many of which differ from the items that the player can use.

====Pokémon X and Y====
* [[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.
* [[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.
* [[Diantha]] uses a '''Mega Charm''' (Japanese: '''メガチャーム''' ''Mega Charm''), which is a gold pendant she wears on her neck.

====Pokémon Omega Ruby and Alpha Sapphire====
* [[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.
* [[Wally]] uses a '''Mega Pendant''' (Japanese: '''メガペンダント''' ''Mega Pendant''), which is a pendant he wears.
* [[Archie]] uses a '''Mega Anchor''' (Japanese: '''メガイカリ''' ''Mega Anchor''), which is a golden, anchor-shaped necklace he wears.
* [[Maxie]] uses '''Mega Glasses''' (Japanese: '''メガメガネ''' ''Mega Glasses''), which is a pair of glasses he wears.
* [[Lisia]] uses a '''Mega Tiara''' (Japanese: '''メガティアラ''' ''Mega Tiara''), which is a hair clip she 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.

====Pokémon Sun, Moon, Ultra Sun, and Ultra Moon====
* [[Sina]] and [[Dexio]] use white '''Mega Rings''' (Japanese: '''メガリング''' ''Mega Ring'') that they each wear around their left wrist.
* Some opponents at the [[Battle Tree]] and [[Battle Royal Dome]] use generic Key Stones, which do not show up on their models.

====Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!====
* All opponents that can Mega Evolve their Pokémon use generic Key Stones, which do not show up on their models.

===Appearance===
====Artwork====
{| style="margin:auto; text-align:center; {{roundy|20px}} border: 2px solid #{{key items color dark}}; background: #{{key items color}}"
|-
|style="{{roundy|20px}} border: 2px solid #{{x color dark}}; background: #{{x color light}}; width:150px"| [[File:Mega Ring male.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{y color dark}}; background: #{{y color light}}; width:150px"| [[File:Mega Ring female.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{fighting color dark}}; background: #{{fighting color light}}; width:150px"| [[File:Korrina Mega Glove.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{fire color dark}}; background: #{{fire color light}}; width:150px"| [[File:Lysandre Mega Ring.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{kalos color dark}}; background: #{{kalos color light}}; width:150px"| [[File:Diantha Mega Charm.png|x130px]]
|- style="font-size: 80%; color:#FFF"
| {{color2|FFF|Calem (game)|Calem}}'s {{color2|FFF|Mega Ring}}
| {{color2|FFF|Serena (game)|Serena}}'s {{color2|FFF|Mega Ring}}
| {{color2|FFF|Korrina}}'s Mega Glove
| {{color2|FFF|Lysandre}}'s Mega Ring
| {{color2|FFF|Diantha}}'s Mega Charm
|-
|style="{{roundy|20px}} border: 2px solid #{{ruby color dark}}; background: #{{ruby color light}}; width:150px"| [[File:Brendan Mega Bracelet.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{sapphire color dark}}; background: #{{sapphire color light}}; width:150px"| [[File:May Mega Bracelet.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{cool color dark}}; background: #{{cool color light}}; width:150px"| [[File:Contest Mega Bracelet male.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{cute color dark}}; background: #{{cute color light}}; width:150px"| [[File:Contest Mega Bracelet female.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{steel color dark}}; background: #{{steel color light}}; width:150px"| [[File:Steven Mega Stickpin.png|x130px]]
|- style="font-size: 80%; color:#FFF"
| {{color2|FFF|Brendan (game)|Brendan}}'s {{color2|FFF|Mega Bracelet}}
| {{color2|FFF|May (game)|May}}'s {{color2|FFF|Mega Bracelet}}
| {{color2|FFF|Brendan (game)|Brendan}}'s {{color2|FFF|Mega Bracelet|Mega Cuff}}
| {{color2|FFF|May (game)|May}}'s {{color2|FFF|Mega Bracelet|Mega Charm}}
| {{color2|FFF|Steven Stone}}'s Mega Stickpin
|- style="font-size: 80%; color:#FFF"
|style="{{roundy|20px}} border: 2px solid #{{tcg grass color dark}}; background: #{{tcg grass color light}}; width:150px"| [[File:Wally Mega Pendant.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{sapphire color dark}}; background: #{{water color light}}; width:150px"| [[File:Archie Mega Anchor.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{ruby color dark}}; background: #{{ground color light}}; width:150px"| [[File:Maxie Mega Glasses.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{contest color dark}}; background: #{{contest color light}}; width:150px"| [[File:Lisia Key Stone accessory.png|x130px]]
|style="{{roundy|20px}} border: 2px solid #{{dragon color dark}}; background: #{{dragon color light}}; width:150px"| [[File:Zinnia Mega Anklet.png|x130px]]
|- style="font-size: 80%; color:#FFF"

| {{color2|FFF|Wally}}'s Mega Pendant
| {{color2|FFF|Archie}}'s Mega Anchor
| {{color2|FFF|Maxie}}'s Mega Glasses
| {{color2|FFF|Lisia}}'s Mega Tiara
| {{color2|FFF|Zinnia}}'s Mega Anklet
|}

====Sprites====
{| style="margin:auto; text-align:center; {{roundy|20px}} border: 2px solid #{{key items color dark}}; background: #{{key items color}}"
|-
|style="{{roundy|20px}} border: 2px solid #{{y color dark}}; background: #{{x color light}}"| {{bag|Mega Ring}}
|style="{{roundy|20px}} border: 2px solid #{{sapphire color dark}}; background: #{{ruby color light}}"| {{bag|Mega Bracelet}}
|style="{{roundy|20px}} border: 2px solid #{{cool color dark}}; background: #{{cool color light}}"| {{bag|Mega Cuff}}
|style="{{roundy|20px}} border: 2px solid #{{cute color dark}}; background: #{{cute color light}}"| {{bag|Mega Charm}}
|style="{{roundy|20px}} border: 2px solid #{{alola color}}; background: #{{alola color light}}"| {{bag|Key Stone SM}}
|style="{{roundy|20px}} border: 2px solid #{{kanto color}}; background: #{{kanto color light}}"| {{bag|Key Stone}}
|- style="font-size: 80%; color:#FFF"
| {{color2|FFF|Mega Ring}}
| {{color2|FFF|Mega Bracelet}}
| {{color2|FFF|Mega Bracelet|Mega Cuff}}
| {{color2|FFF|Mega Bracelet|Mega Charm}}
| Key Stone<br>({{color2|fff|Pokémon Sun and Moon|SM}}{{color2|fff|Pokémon Ultra Sun and Ultra Moon|USUM}})
| Key Stone<br>({{color2|fff|Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!|PE}})
|}

===Price===
{{ItemPrice/head|Key items}}
{{ItemPrice|{{gameabbrev6|XYORAS}}<br>{{gameabbrev7|SMUSUMPE}}|N/A|N/A}}
|}
|}

===Effect===
Allows the player to [[Mega Evolution|Mega Evolve]] their Pokémon if they hold the appropriate [[Mega Stone]]. Each Trainer can only Mega Evolve one Pokémon per battle.

===Description===
;[[Mega Ring]]
{{movedesc|X}}
{{movedescentry|{{gameabbrev6|XY}}|This ring contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.}}
{{movedescentry|{{gameabbrev6|ORAS}}<br>{{gameabbrev7|SMUSUMPE}}<br>{{gameabbrev8|SwShBDSPLA}}|This ring contains an untold power that somehow enables Pokémon carrying Mega Stones to Mega Evolve in battle.}}
{{movedescentry|{{gameabbrev9|SV}}|This ring contains an unknown power that somehow enables a Pokémon carrying a Mega Stone to Mega Evolve in battle.}}
|}
|}

;[[Mega Bracelet]]
{{movedesc|Omega Ruby}}
{{movedescentry|{{gameabbrev6|ORAS}}<br>{{gameabbrev7|SMUSUMPE}}<br>{{gameabbrev8|SwShBDSPLA}}|This cuff contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.}}
{{movedescentry|{{gameabbrev9|SV}}|This bracelet contains an unknown power that somehow enables a Pokémon carrying a Mega Stone to Mega Evolve in battle.}}
|}
|}

;Key Stone
{{movedesc|Sun}}
{{movedescentry|{{gameabbrev6|ORAS}}|A stone of unexplained power that makes Pokémon Mega Evolve.}}
{{movedescentry|{{gameabbrev7|SMUSUM}}|A stone filled with an unexplained power. It makes Pokémon that battle with a Mega Stone Mega Evolve.}}
{{movedescentry|{{gameabbrev7|PE}}|A stone filled with an unexplained power. It reacts to Mega Stones and makes Pokémon Mega Evolve.}}
{{movedescentry|{{gameabbrev8|SwShBDSPLA}}<br>{{gameabbrev9|SV}}|A stone filled with an unexplained power. It makes Pokémon that battle with a Mega Stone Mega Evolve.}}
|}
|}

===Acquisition===
{{ItemAvailability/keyhead|key items}}
|-
| {{gameabbrev6|XY}}
| '''[[Mega Ring]]''': [[Tower of Mastery]] (from [[Korrina]] after earning the {{badge|Rumble}})
|-
| {{gameabbrev6|ORAS}}
| '''[[Mega Bracelet]]''': [[Southern Island]] (from {{Steven}} after obtaining {{p|Latios}}{{sup/6|OR}}/{{p|Latias}}{{sup/6|AS}})
|-
| {{gameabbrev7|SM}}
| '''Key Stone''': [[Ancient Poni Path]] (from [[Dexio]] after becoming {{pkmn|Champion}})
|-
| {{gameabbrev7|USUM}}
| '''Key Stone''': [[Poni Plains]] (from [[Dexio]] after becoming {{pkmn|Champion}})
|-
| {{gameabbrev7|PE}}
| '''Key Stone''': [[Professor Oak's Laboratory]] (from {{ga|Blue}} after earning seven [[Badge]]s)
|}
|}

==In the spin-off games==
{{incomplete|section|Names for the Mega Key in other languages}}
===[[Pokémon Rumble World]]===
The player obtains a '''Mega Key''' after completing the Raid of the Mighty General [[Pokémon Rumble World#Challenges|challenge]].

==In animation==
===''Pokémon the Series''===
===={{aniseries|XY}}====
[[File:Alain Mega Ring.png|thumb|250px|Alain showcasing his Mega Ring]]
In ''[[XYS01|Mega Evolution Special I]]'', [[Alain]] was seen wearing a [[Mega Ring]] similar to that of the protagonists of [[Pokémon X and Y]]. He uses it to Mega Evolve his {{TP|Alain|Charizard}} into Mega Charizard X. In ''[[XYS02|Mega Evolution Special II]]'', it was revealed that he received it from [[Lysandre]]. After the [[Team Flare]] crisis, Alain gave his Mega Ring to the authorities to be used as evidence and resolved find himself a new Key Stone on his own.

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 opening credits of ''[[M17|Diancie and the Cocoon of Destruction]]''.

In ''[[XY028|The Bonds of Evolution!]]'', [[Diantha]] tapped into the power of her Mega Charm to Mega Evolve her {{TP|Diantha|Gardevoir}}, giving it the power to break free from {{TRT}}'s clutches. The Mega Charm has also been seen during Diantha's subsequent appearances.

In ''[[XY030|Mega Revelations!]]'', {{an|Korrina}} was shown wearing her Key Stone in her Mega Glove, having received it from [[Gurkinn|her grandfather]]. However, her {{TP|Korrina|Lucario}} lacked the Lucarionite, meaning that she wasn't able to use it yet. After obtaining a Lucarionite in ''[[XY031|The Cave of Trials!]]'', she was soon able to use her Key Stone in order to Mega Evolve her Lucario.

In ''[[XY032|The Aura Storm!]]'', Gurkinn uses a Key Stone 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 ''[[XY034|The Bonds of Mega Evolution!]]''. Embedded in her walking stick, she uses it to Mega Evolve her {{p|Mawile}} into Mega Mawile.

In ''[[M17|Diancie and the Cocoon of Destruction]]'', a diamond Diancie had created and given to {{an|Bonnie}} earlier caused it to Mega Evolve, acting as a Key Stone. At the end of the movie, Bonnie returned the diamond to Diancie.

''[[XYS02|Mega Evolution Special II]]'' featured {{an|Steven Stone}} and his Mega Stickpin. Alain was able to recognize the Key Stone on the {{pkmn|Champion}}'s person, leading him to challenge Steven to a battle.

In the same episode, [[Giant Rock|a giant Key Stone]] was discovered by Steven and Alain. While Lysandre's scientists were inspecting it, {{DL|Super-ancient Pokémon (XY series)|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 {{m|Draco Meteor}}. The stone reappeared in ''[[XYS03|Mega Evolution Special III]]'', along with Mega Rayquaza. It was eventually taken away by Lysandre's submarine to be studied at the [[Lysandre Labs]].

In ''[[XY068|Garchomp's Mega Bond!]]'', it was revealed that {{an|Professor Sycamore}} had found a Key Stone along with a piece of [[Garchompite]]. He uses them to Mega Evolve his {{TP|Professor Sycamore|Garchomp}}. In the same episode, it was revealed that [[Meyer|Blaziken Mask]] keeps his Key Stone embedded in his belt buckle.

Multiple Key Stones appeared in ''[[XYS04|Mega Evolution Special IV]]''. A Trainer with a {{me|Venusaur}} has his Key Stone inside of a pocket watch, a {{me|Alakazam}} Trainer wears his Key Stone on his turban, [[Malva]] carries her Key Stone in a necklace, a {{me|Banette}} Trainer has his embedded on his Banette puppet, and [[Lysandre]] has his Key Stone embedded in a Mega Ring he wears on his left hand.

A Key Stone belonging to [[Wulfric]] appeared in ''[[XY122|A Real Icebreaker!]]''. The [[Snowbelle City]] [[Gym Leader]] keeps his Key Stone inside of the locket he wears around his neck, and uses it to Mega Evolve his {{p|Abomasnow}}.

In ''[[XY125|A League of His Own!]]'', {{an|Trevor}} was revealed to have a Key Stone embedded on his camera's shutter button. With it, he is able to Mega Evolve his {{TP|Trevor|Charizard}} into Mega Charizard Y.

In ''[[XY126|Valuable Experience for All!]]'', [[Sawyer]] was revealed to have a Key Stone attached on the end of his notebook latch. He uses it to Mega Evolve his {{TP|Sawyer|Sceptile}}. In ''[[XY138|The First Day of the Rest of Your Life!]]'', Sawyer revealed that he received his Key Stone from Steven.

A Key Stone held by [[Kimia]] appeared in ''[[M19|Volcanion and the Mechanical Marvel]]'', wearing it on a bracelet around her left wrist. She uses it to Mega Evolve her {{Shiny}} Gardevoir.

===={{aniseries|SM}}====
[[File:Misty showcasing her Key Stone.png|thumb|250px|Misty showcasing her Key Stone]]
A Key Stone belonging to {{an|Brock}}, located on a necklace under his shirt, and a Key Stone belonging to {{an|Misty}}, located on her hair band, appeared in ''[[SM043|When Regions Collide!]]''. They use them to Mega Evolve their {{TP|Brock|Steelix}} and {{TP|Misty|Gyarados}}, respectively.

In ''[[SM089|The Prism Between Light and Darkness!]]'', [[Gozu]] was revealed to own a Key Stone embedded in a dog tag that is kept hidden under his [[Team Rocket]] uniform. He uses it to Mega Evolve his {{p|Aggron}}.

In ''[[SM130|Battling Besties!]]'', [[Ilima]] was revealed to possess a Key Stone, which is attached to a string he can wear around his wrist. He uses it to Mega Evolve his {{p|Kangaskhan}}.

===={{aniseries|JN}}====
In ''[[JN084|An Adventure of Mega Proportions!]]'', {{Ash}} received a Mega Glove from Korrina. The Key Stone enhanced the [[Aura]] of both Ash and his {{AP|Lucario}}, and also allowed them to locate the [[Mega Stone]] for the Aura Pokémon. After obtaining the Mega Stone, Ash became able to Mega Evolve his Lucario.

In ''[[JN104|Taking Two For The Team!]]'', [[Drasna]] was shown to own a Key Stone, which she wears around her right wrist. She uses it to Mega Evolve her {{p|Altaria}}.

In ''[[JN105|Reuniting for the First Time!]]'', [[Lisia]] used her Mega Tiara to Mega Evolve her Altaria, Ali, during the [[Lilycove City]] [[Pokémon Contest Spectacular]].

In ''[[JN115|Curtain Up! Fight the Fights!]]'', Alain was revealed to have acquired a new Mega Ring.

In ''[[JN117|The Fiery Road to Mastership!]]'', {{an|Cynthia}} was revealed to own a Key Stone, which is embedded in her lipstick. She uses it to Mega Evolve her {{TP|Cynthia|Garchomp}}.

====Gallery====
<gallery>
Key Stone anime.png|[[Alain]]'s first Key Stone
Alain Mega Ring 2.png|Alain's second Key Stone
Astrid Key Stone.png|[[Astrid]]'s Key Stone located on her earring
Remo Key Stone.png|[[Remo]]'s Key Stone located on his parasol
Siebold Key Stone.png|[[Siebold]]'s Key Stone located on his frilled tie
Diantha Mega Charm anime.png|[[Diantha]]'s Mega Charm
Korrina Mega Glove anime.png|{{an|Korrina}}'s Mega Glove
Mabel Key Stone.png|[[Mabel]]'s Key Stone on her staff
Steven Mega Stickpin anime.png|{{an|Steven Stone}}'s Mega Stickpin
Professor Sycamore Key Stone.png|{{an|Professor Sycamore}}'s Key Stone
Meyer Key Stone.png|[[Meyer]]'s Key Stone
Malva Key Stone.png|[[Malva]]'s Key Stone located on her necklace
Lysandre Key Stone.png|[[Lysandre]]'s Mega Ring
Wulfric Key Stone.png|[[Wulfric]]'s Key Stone located in his necklace pendant
Trevor Key Stone.png|{{an|Trevor}}'s Key Stone located on his camera
Sawyer Key Stone.png|[[Sawyer]]'s Key Stone located on his bookmark
Brock Key Stone.png|{{an|Brock}}'s Key Stone located on his necklace
Misty Key Stone.png|{{an|Misty}}'s Key Stone located on her hairband
Gozu Key Stone.png|[[Gozu]]'s Key Stone located on his necklace ID tags
Ilima Key Stone.png|[[Ilima]]'s Key Stone located on his bracelet
Ash Mega Glove.png|{{Ash}}'s Mega Glove
Drasna Key Stone.png|[[Drasna]]'s Key Stone located on her bracer
Lisia Mega Tiara anime.png|[[Lisia]]'s Mega Tiara
Cynthia Key Stone.png|{{an|Cynthia}}'s Key Stone located on her lipstick
</gallery>

===Pokémon Origins===
[[File:Mega Stone PO.png|thumb|250px|A Key Stone (right) in [[Pokémon Origins]]]]
In ''[[PO02|File 2: Cubone]]'', after helping drive off driving [[Team Rocket]] out of the [[Pokémon Tower]] and helping {{OBP|Marowak|ghost|the ghost of Marowak}} find peace, {{OBP|Red|Origins}} received a Key Stone and a [[Charizardite X]] from [[Mr. Fuji]]. The Key Stone and Mega Stone activated in ''[[PO04|File 4: Charizard]]'' during Red's showdown with {{p|Mewtwo}}, Mega Evolving his trusted [[first partner Pokémon]], {{TP|Red|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.

===Pokémon Omega Ruby and Alpha Sapphire Animated Trailer===
In the [[Pokémon Omega Ruby and Pokémon Alpha Sapphire Animated Trailer]], Brendan and {{ga|May}} were seen wearing their [[Mega Bracelet]]s. They used them to Mega Evolve the [[Hoenn first partner Pokémon]].

===Pokémon Generations===
In ''[[PG07|The Vision]]'', {{ga|Brendan}} and [[Maxie]] were seen wearing their Mega Bracelet and Mega Glasses, respectively. Furthermore, [[Archie]] could be seen wearing his Mega Anchor in ''[[PG08|The Cavern]]''. None of them were seen using their Key Stones, however.

===Pokémon Evolutions===
[[File:Key Stone Evolutions.png|thumb|250px|Key Stones in [[Pokémon Evolutions]]]]
In ''[[PE03|The Visionary]]'', [[Lysandre]] used his Mega Ring to Mega Evolve his {{p|Gyarados}} during his battle against {{ga|Calem}}. Calem and {{ga|Serena}} were also seen wearing a [[Mega Ring]] each, but they were not seen using them.

In ''[[PE06|The Wish]]'', {{ga|May}} was shown to own a Mega Bracelet, while [[Zinnia]] was shown to possess a Mega Anklet and four stolen Key Stones, which she used to summon {{p|Rayquaza}}. May later used her Mega Bracelet to Mega Evolve her {{p|Swampert}} to battle Rayquaza, and Rayquaza itself once she had caught it.
{{-}}

==In the manga==
===Pokémon Adventures===
[[File:Mega Ring Adventures.png|230px|thumb|A Mega Ring in [[Pokémon Adventures]]]]
===={{MangaArc|X & Y}}====
{{adv|X}} was given a [[Mega Ring]] with a Key Stone inside from [[Gurkinn]] as a child. With it, he can Mega Evolve his [[Kanga and Li'l Kanga|Li'l Kanga]], [[Salamè]], [[Élec]], {{p|Gengar|Garma}}, and {{p|Pinsir|Rute}}, into {{me|Kangaskhan}}, Mega Charizard X, Mega Manectric, Mega Gengar, and Mega Pinsir, respectively.

Those taught by Gurkinn, the Mega Evolution guru, tend to use Mega Gloves. This includes [[Korrina]], three unnamed students, and Gurkinn himself. Gurkinn stated that he gave Key Stones to 16 people through a Mega Evolution successor ceremony, with X being the sole exception. He later gave his Key Stone to {{adv|Y}}, thus making her a successor as well.

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 {{TP|Diantha|Gardevoir}} into Mega Gardevoir.

Lysandre later obtains a Mega Ring from Malva outfitted with a Key Stone stolen from Korrina.

At the [[Lost Hotel]], {{adv|Y}} is made a Mega Evolution successor by Gurkinn. She is given a Mega Ring outfitted with the Key Stone from Gurkinn's Mega Glove. With it, she can Mega Evolve her {{p|Absol|Solsol}} into Mega Absol.

{{adv|Blue}} is later revealed to be a successor as well, keeping his Key Stone on a ring. When not in use, Blue wears the ring around his neck as a pendant. With it, he can Mega Evolve his {{TP|Blue|Charizard}} into Mega Charizard Y.

[[Blaine]] later appears at the [[Pokémon Village]], revealed to have reunited with {{adv|Mewtwo}}. He had gained a Key Stone sometime prior and placed it in his cane, using it to Mega Evolve Mewtwo into either Mega Mewtwo Y or Mega Mewtwo X.

[[File:Mega Bracelet Adventures.png|230px|thumb|Mega Bracelets in Pokémon Adventures]]
===={{MangaArc|Omega Ruby & Alpha Sapphire}}====
{{adv|Ruby}}, {{adv|Sapphire}}, and {{adv|Emerald}} acquired [[Mega Bracelet]]s from [[Ultima]] and {{Steven}} in preparation for another disaster coming to Hoenn. In ''[[PS598|Claydol Unleashes]]'', Ruby successfully used his Mega Bracelet and {{p|Latios}}'s Latiosite to Mega Evolve the Eon Pokémon and [[Soaring in the sky|soar]] with it to the [[Sky Pillar]].

Many members of the [[Draconid people]] possess Key Stones, such as Zinnia, [[Renza]], [[Jinga]], [[Tomatoma]], and the [[Elder (Meteor Village)|Meteor Village Elder]]. While Zinnia keeps her Key Stone in her Mega Anklet, Renza, Jinga, and Tomatoma keep theirs in arm bands, similar to Zinnia's anklet, while the Elder keeps hers in a walking cane. When battling Ruby and Sapphire, Zinnia wears a second Mega Anklet that originally belonged to [[Aster]].

In ''[[PS602|Hoopa Distorts]]'', {{Steven}} Mega Evolved his {{TP|Steven|Metagross}} into Mega Metagross with his Mega Stickpin. In [[PS616]], he reveals that he is a Mega Evolution successor, having obtained the Key Stone from Gurkinn. He later gives Zinnia a jar of Key Stones belonging to Aster that were taken from the [[Embedded Tower]].

In ''[[PS607|Blastoise Transforms]]'', [[Maxie]] and [[Archie]] used their Mega Glasses and Mega Anchor to Mega Evolve their {{p|Camerupt}} and {{p|Sharpedo}} respectively. After Maxie and Archie disappeared from exhausting the energy keeping their bodies stable, [[Blaise]] and {{adv|Amber}} took their Key Stones and Mega-Evolving Pokémon.

When battling against Maxie and Archie, {{adv|Red}} and {{adv|Green}} used rings with patterns similar to the Mega Bracelets to Mega Evolve [[Saur]] and [[Blasty]] respectively to battle them. Though their rings resemble the one owned by Blue, it is unknown where they received them.

In [[PS616]], {{adv|Giovanni}} was revealed to have a Key Stone placed in the "R" of his chest pocket. With it, he can Mega Evolve his {{TP|Giovanni|Beedrill}}.

In ''[[PAORAS21|Omega Alpha Adventure 21]]'', Ruby used his Mega Cuff to Mega Evolve {{p|Diancie}} for a {{pkmn|Contest}} [[Appeal]].

====Gallery====
<gallery>
File:Red Green Key Stone Adventures.png|{{adv|Red}} and {{adv|Green}}'s Key Stones
File:Blue Key Stone Adventures.png|{{adv|Blue}}'s Key Stone
File:Ruby Mega Bracelet.png|{{adv|Ruby}}'s Mega Bracelet
File:Mega Cuff Adventures.png|Ruby's Mega Cuff
File:Sapphire Mega Bracelet.png|{{adv|Sapphire}}'s Mega Bracelet
File:Emerald Mega Bracelet.png|{{adv|Emerald}}'s Mega Bracelet
File:X Mega Ring.png|{{adv|X}}'s Mega Ring
File:Y Mega Ring.png|{{adv|Y}}'s Mega Ring
File:Giovanni Key Stone Adventures.png|{{adv|Giovanni}}'s Key Stone
File:Blaine Key Stone Adventures.png|[[Blaine]]'s Key Stone
File:Korrina Mega Glove Adventures.png|[[Korrina]]'s Mega Glove
File:Steven Mega Stickpin Adventures.png|{{Steven}}'s Mega Stickpin
File:Diantha Mega Charm Adventures.png|[[Diantha]]'s Mega Charm
File:Archie Mega Anchor Adventures.png|[[Archie]]'s Mega Anchor
File:Maxie Mega Glasses Adventures.png|[[Maxie]]'s Mega Glasses
File:Lysandre Key Stone Adventures.png|[[Lysandre]]'s Mega Ring
File:Zinnia Mega Anklet Adventures.png|[[Zinnia]]'s Mega Anklet
File:Blaise Mega Glasses Amber Mega Anchor Adventures.png|[[Blaise]]'s Mega Glasses and {{adv|Amber}}'s Mega Anchor
File:Jinga.png|[[Jinga]]'s Key Stone
</gallery>

==Trivia==
[[File:Bag unknown Sprite.png|thumb]]
* The Key Stone items used by NPCs [[List of unobtainable items|exist within the data]] of [[Pokémon X and Y]] and [[Pokémon Omega Ruby and Alpha Sapphire]]. They have a sprite (a white question mark), but cannot be obtained in normal gameplay. They were programmed into the game because if not, NPCs wouldn't be able to Mega Evolve their Pokémon.
* In [[Generation VI]], before battle with a non-player character 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 {{ga|Calem}}/{{ga|Serena}} and {{ga|Brendan}}/{{ga|May}}, have the Key Stone accessory visible on their 3D model, but it is not focused on. However, other Trainers, such as [[Courtney]], [[Matt]] and the [[Hoenn]] [[Elite Four]], do not have visible Key Stones at all. {{tc|Secret Base Trainer}}s have no visible indication of possessing a Key Stone.

==In other languages==
''Key Stone''
{{langtable|color={{x color}}|bordercolor={{y color dark}}|textcolor=fff
|zh_yue=鑰石 ''{{tt|Yeuhksehk|Key Stone}}'' {{tt|*|Games}}<br>鍵石''{{tt|Gihnsehk|Key Stone}}'' {{tt|*|XY030 episode summary}}<br>Key Stone {{tt|*|Anime}}
|zh_cmn=鑰石 / 钥石 ''{{tt|Yàoshí|Key Stone}}'' {{tt|*|Games}}<br>進化鑰石 ''{{tt|Jìnhuà Yàoshí|Evolution Key Stone}}'' {{tt|*|Anime}}<br>關鍵石 ''{{tt|Guānjiàn Shí}}'' {{tt|*|Tretta}}
|da=Nøglesten
|nl=Sleutelsteen
|de=Schlüssel-Stein
|fr=Gemme Sésame
|fi=Avainkivi
|id=Batu Kunci
|it=Pietrachiave
|ko=키스톤 ''Key Stone''
|no=Nøkkelstein
|pl=Kamień Klucza
|pt_br=Pedra-Chave ([[S19]])<br>Pedra Chave ([[S17]]-[[S18]])
|pt_eu=Pedra Chave
|ru=Ключевой Камень ''Klyuchevoy Kamen'''
|es_la=Piedra llave
|es_eu=Piedra activadora
|sv=Nyckelsten
|vi=Đá Chìa Khóa
}}

<div style="display:inline-block; vertical-align:top">
''Mega Charm''
{{langtable|color={{kalos color}}|bordercolor={{kalos color dark}}|textcolor=fff
|zh_yue=超級墜飾 ''{{tt|Chīukāp Jeuihsīk|Super Charm}}''
|zh_cmn=超級墜飾 / 超级坠饰 ''{{tt|Chāojí Zhuìshì|Super Charm}}'' 
|fr=Méga-Charme
|de=Megaillon
|it=Megaciondolo
|ko=메가참 ''Mega Charm''
|es=Megacolgante}}</div>
<div style="display:inline-block; vertical-align:top">
''Mega Glove''
{{langtable
|color={{fighting color}}|bordercolor={{fighting color dark}}
|zh_yue=超級手套 ''{{tt|Chīukāp Sáutou|Super Glove}}'' {{tt|*|Games}}
|zh_cmn=超級手套 / 超级手套 ''{{tt|Chāojí Shǒutào|Super Glove}}'' {{tt|*|Games, Adventures}}
|fi=Megahanska
|fr=Méga-Gant
|de=Mega-Handschuh
|it=Megaguanto
|ko=메가글러브 ''Mega Glove''
|pl=Megarękawica
|pt_br=Megaluva
|es=Megaguante}}</div>
<div style="display:inline-block; vertical-align:top">
''Mega Stickpin''
{{langtable|color={{steel color}}|bordercolor={{steel color dark}}
|zh_yue=超級領針 ''{{tt|Chīukāp Léhngjām|Super Lapel Pin}}'' {{tt|*|Games}}
|zh_cmn=超級領針 / 超级领针 ''{{tt|Chāojí Lǐngzhēn|Super Lapel Pin}}'' {{tt|*|Games}}
|fr=Méga-Pin
|de=Mega-Anstecker
|it=Megaspilla
|ko=메가라펠핀 ''Mega Lapel Pin''
|es=Megabroche}}</div>
<div style="display:inline-block; vertical-align:top">
''Mega Pendant''
{{langtable|color={{tcg grass color light}}|bordercolor={{tcg grass color}}
|zh_yue=超級吊墜 ''{{tt|Chīukāp Diujéui|Super Pendant}}'' {{tt|*|Games}}
|zh_cmn=超級吊墜 / 超级吊坠 ''{{tt|Chāojí Diàozhuì|Super Pendant}}'' {{tt|*|Games}}
|fr=Méga-Pendentif
|de=Mega-Anhänger
|it=Megapendente
|es=Megacollar
|ko=메가펜던트 ''Mega Pendant''}}</div>
<div style="display:inline-block; vertical-align:top">
''Mega Glasses''
{{langtable|color={{ruby color}}|bordercolor={{ruby color dark}}|textcolor=fff
|zh_yue=超級眼鏡 ''{{tt|Chīukāp Ngáahngéng|Super Glasses}}'' {{tt|*|Games}}
|zh_cmn=超級眼鏡 / 超级眼镜 ''{{tt|Chāojí Yǎnjìng|Super Glasses}}'' {{tt|*|Games}}
|fr=Méga-Lunettes
|de=Mega-Brille
|es=Megagafas
|it=Megaocchiali
|ko=메가글라스 ''Mega Glass''}}</div>
<div style="display:inline-block; vertical-align:top">
''Mega Anchor''
{{langtable|color={{sapphire color light}}|bordercolor={{sapphire color}}
|zh_yue=超級船錨 ''{{tt|Chīukāp Syùhnmàauh|Super Anchor}}'' {{tt|*|Games}}
|zh_cmn=超級船錨 / 超级船锚 ''{{tt|Chāojí Chuánmáo|Super Anchor}}'' {{tt|*|Games}}
|fr=Méga-Ancre
|de=Mega-Anker
|es=Megaancla
|it=Megaancora
|ko=메가앵커 ''Mega Anchor''}}</div>
<div style="display:inline-block; vertical-align:top">
''Mega Anklet''
{{langtable|color={{dragon color light}}|bordercolor={{dragon color}}
|zh_yue=超級腳鐲 ''{{tt|Chīukāp Geukjuhk|Super Anklet}}'' {{tt|*|Games}}
|zh_cmn=超級腳鐲 / 超级脚镯 ''{{tt|Chāojí Jiǎozhuó|Super Anklet}}'' {{tt|*|Games}}
|fr=Méga-Grève
|de=Mega-Beinreif
|es=Megatobillera
|it=Megagambale
|ko=메가앵클릿 ''Mega Anklet''}}</div>
<div style="display:inline-block; vertical-align:top">
''Mega Tiara''
{{langtable|color={{contest color}}|bordercolor={{contest color dark}}
|zh_yue=超級頭冠 ''{{tt|Chīukāp Tàuhgūn|Super Tiara}}'' {{tt|*|Games}}
|zh_cmn=超級頭冠 / 超级头冠 ''{{tt|Chāojí Tóuguān|Super Tiara}}'' {{tt|*|Games}}
|fr=Méga-Barette
|de=Mega-Diadem
|es=Megatiara
|it=Megatiara
|ko=메가티아러 ''Mega Tiara''}}</div>

''Mega Ring''
{{main|Mega Ring#In other languages|Mega Ring → In other languages}}

''Mega Bracelet''
{{main|Mega Bracelet#In other languages|Mega Bracelet → In other languages}}

''Mega Cuff''
{{main|Mega Bracelet#In other languages|Mega Bracelet → In other languages}}

==See also==
* [[Mega Evolution]]
* [[Mega Stone]]
* [[Mega Ring]]
* [[Mega Bracelet]]
* [[List of Key Items in Generation VII]]
* [[:Category:Trainers with Key Stones]]

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[[Category:Items]]
[[Category:Equipment]]
[[Category:Key Items]]
[[Category:Form-changing items]]

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[[es:Piedra activadora]]
[[fr:Gemme Sésame]]
[[it:Pietrachiave]]
[[ja:キーストーン]]
[[zh:钥石（道具）]]