Mega Stone

Mega Mewtwo Y

Mega Stone (Japanese: メガストーン, Hepburn: Mega Sutōn) are evolutionary stones that allow certain Pokémon to reach their final form for one-evolution families and second/true final form for two-evolution/branch-evolution families.

Each Mega Stone has a "-ite" or "-nite" on the end of it preceded by the related Pokemon's name.

Example:

Lucario's Mega Stone is called Lucario-"nite"

Blaziken's Mega Stone is Blaziken-"ite" 

It is very possible that certain Mega stones like the Blazikenite can't be obtained through normal gameplay and only by means of special offers.

Certain Pokémon will be able to evolve into a Mega form with the use of a Mega Stone, a held object. However this evolution will devolve into to their pre-evolved form at the end of the battle.

Mega Stone Locations

List of Mega Stone Locations
Name	Location	Evolve to
Venusaurite	Professor Sycamore's Laboratory in Lumiose City if chosen as starter. Vernal Avenue Stone Emporium in Lumiose City if not chosen as starter.	Mega Venusaur
Blastoisite	Professor Sycamore's Laboratory in Lumiose City if chosen as starter. Vernal Avenue Stone Emporium in Lumiose City if not chosen as starter.	Mega Blastoise
Alakazite	After beating the Elite Four this can be found in Reflecting Cave B3F.	Mega Alakazam
Gengarite	Given to you by a Hex Maniac in Laverre City if player has already seen a Haunter.	Mega Gengar
Kangaskhanite	After beating the Elite Four this can be found in Glittering Cave.	Mega Kangaskhan
Gyaradosite	After beating the Elite Four this can be found in Couriway Town.	Mega Gyarados
Aerodactylite	Given to you in Ambrette Town.	Mega Aerodactyl
Ampharosite	Given to you in Azure Bay.	Mega Ampharos
Scizorite	After beating the Elite Four this can be found in the Frozen Cavern by an Abomasnow	Mega Scizor
Blazikenite	Event Torchic	Mega Blaziken
Gardevoirite	Held by Ralts traded from Champion Diantha in café Soleil in Lumiose City, Southern Boulevard.	Mega Gardevoir
Medichamite	After beating the Elite Four this can be found in Laverre City.	Mega Medicham
Banettite	After beating the Elite Four this can be found in Cave of Emptiness.	Mega Banette
Absolite	After beating the Elite Four this can be found in Kiloude City.	Mega Absol
Garchompite	After beating the Elite Four this can be found in Victory Road	Mega Garchomp
Lucarionite	Held by Lucario given to you.	Mega Lucario
Abomasite	Found behind the Abomasnow in Frozen Cavern.	Mega Abomasnow

Exclusive To X

List of Mega Stone Locations
Name	Location	Evolve to
Charizardite X	Professor Sycamore's Laboratory in Lumiose City if chosen as starter. Vernal Avenue Stone Emporium in Lumiose City if not chosen as starter.	Mega Charizard X
Pinsirite	After beating the Elite Four this can be found in Santalune Forest, X only.	Mega Pinsir
Mewtwonite X	After beating the Elite Four this can be found in Unknown Dungeon, X only.	Mega Mewtwo X
Tyranitarite	After beating the Elite Four this can be found in Cillage Gym, X only.	Mega Tyranitar
Manectite	After beating the Elite Four this can be found in Kalos Route 16, X only.	Mega Manectric

Exclusive To Y

List of Mega Stone Locations
Name	Location	Evolve to
Charizardite Y	Professor Sycamore's Laboratory in Lumiose City if chosen as starter. Vernal Avenue Stone Emporium in Lumiose City if not chosen as starter.	Mega Charizard Y
Mewtwonite Y	After beating the Elite Four this can be found in Unknown Dungeon, Y only.	Mega Mewtwo Y
Heracronite	After beating the Elite Four this can be found in Santalune Forest, Y only.	Mega Heracross
Houndoomite	After beating the Elite Four this can be found in Kalos Route 16, Y only.	Mega Houndoom
Aggronite	After beating the Elite Four this can be found in Cillage Gym, Y only.	Mega Aggron

Gallery

Absolite anime.png

Astrid's Absol's Absolite

Blastoisinite anime.png

Siebold's Blastoise's Blastoisinite

Charizardite X anime.png

Alain's Charizard's Charizardite X

Garchompite anime.png

Garchoo's Garchompite

Gardevoirite anime.png

Diantha's Gardevoir's Gardevoirite

Lucarionite anime.png

Korrina's Lucario's Lucarionite