Key Stone
Generation
Generation VI
Category
Key Items
Consumable
No
Holdable
No
Field Use
No
Battle Use
Yes
Description
A mysterious stone that reacts with a Pokémon's Mega Stone to enable Mega Evolution during battle.
| Generation | |
|---|---|
| Generation VI |  Key Items |
| Generation VII | Key Items |
Effects
Battle
Evolution Trigger
Gen VI+
Allows one Pokémon holding a Mega Stone to Mega Evolve per battle.
Flavor Texts
ORAS
A stone of unexplained power that makes Pokémon Mega Evolve.
SM
USUM
BDSP
LA
SWSH
SV
A stone filled with an unexplained power. It makes Pokémon that battle with a Mega Stone Mega Evolve.
LGPLGE
A stone filled with an unexplained power. It reacts to Mega Stones and makes Pokémon Mega Evolve.
Notes
Unobtainable in Generation VIII.
Acquisitions
| Versions | Method | Location | Requirements | |||
|---|---|---|---|---|---|---|
X Y | Tower of Mastery From Korrina after earning the Rumble Badge (Mega Ring) | Badge: rumble-badge | ||||
OR | Southern Island From Steven after obtaining Latios (Mega Bracelet) | After obtaining Latios | ||||
AS | Southern Island From Steven after obtaining Latias (Mega Bracelet) | After obtaining Latias | ||||
M S | Ancient Poni Path From Dexio after becoming Champion | After becoming Champion | ||||
UM US | Poni Plains From Dexio after becoming Champion | After becoming Champion | ||||
LGE LGP | Professor Oak's Laboratory From Blue after earning seven Badges | After earning seven Badges | ||||
ZA | Jaune Sector 10 From AZ before facing the Rogue Mega Absol (Mega Ring) | Before facing the Rogue Mega Absol |
Spin-Off Games
| Game | Effect | Acquisition |
|---|---|---|
| Pokémon Rumble World | Allows Mega Evolution in Pokémon Rumble World. | Complete the Raid of the Mighty General challenge |
Sprites
SM
LGPLGE
Other Languages
キーストーン (Kī Sutōn)
鑰石 (Yeuhksehk)
鑰石 (Yàoshí)
Gemme Sésame
Schlüssel-Stein
Pietrachiave
키스톤
Piedra LlavePiedra Activadora