Pokémon X & Y Mega Stones

Cyllage City, Santalune Forest and Route 16 each hold a different stone in X than in Y, such as Tyranitarite in X and Aggronite in Y at Cyllage City. Mewtwonite X and Y split by version in the Unknown Dungeon too.

• AbomasiteMega AbomasnowGiftOne variety of the mysterious Mega Stones. Have Abomasnow hold it, and this stone will enable it to Mega Evolve during battle.Gift · Frost Cavern
• AbsoliteMega AbsolGiftOne variety of the mysterious Mega Stones. Have Absol hold it, and this stone will enable it to Mega Evolve during battle.Gift · Kiloude City
• AerodactyliteMega AerodactylGiftOne variety of the mysterious Mega Stones. Have Aerodactyl hold it, and this stone will enable it to Mega Evolve during battle.Gift · Ambrette Town
• AggroniteMega AggronItem ballOne variety of the mysterious Mega Stones. Have Aggron hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Cyllage City
• AlakaziteMega AlakazamItem ballOne variety of the mysterious Mega Stones. Have Alakazam hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Reflection Cave
• AmpharositeMega AmpharosGiftOne variety of the mysterious Mega Stones. Have Ampharos hold it, and this stone will enable it to Mega Evolve during battle.Gift · Azure Bay
• BanettiteMega BanetteItem ballOne variety of the mysterious Mega Stones. Have Banette hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Chamber of Emptiness
• BlastoisiniteMega BlastoiseGiftOne variety of the mysterious Mega Stones. Have Blastoise hold it, and this stone will enable it to Mega Evolve during battle.Gift · Lumiose City
• Charizardite XMega Charizard XGiftOne variety of the mysterious Mega Stones. Have Charizard hold it, and this stone will enable it to Mega Evolve during battle.Gift · Lumiose City
• Charizardite YMega Charizard YGiftOne variety of the mysterious Mega Stones. Have Charizard hold it, and this stone will enable it to Mega Evolve during battle.Gift · Lumiose City
• GarchompiteMega GarchompItem ballOne variety of the mysterious Mega Stones. Have Garchomp hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Victory Road
• GardevoiriteMega GardevoirTradeOne variety of the mysterious Mega Stones. Have Gardevoir hold it, and this stone will enable it to Mega Evolve during battle.Trade · Lumiose City
• GengariteMega GengarGiftOne variety of the mysterious Mega Stones. Have Gengar hold it, and this stone will enable it to Mega Evolve during battle.Gift · Laverre City
• GyaradositeMega GyaradosItem ballOne variety of the mysterious Mega Stones. Have Gyarados hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Couriway Town
• HeracroniteMega HeracrossItem ballOne variety of the mysterious Mega Stones. Have Heracross hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Santalune Forest
• HoundoominiteMega HoundoomItem ballOne variety of the mysterious Mega Stones. Have Houndoom hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Route 16
• KangaskhaniteMega KangaskhanItem ballOne variety of the mysterious Mega Stones. Have Kangaskhan hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Glittering Cave
• LucarioniteMega LucarioItem ballOne variety of the mysterious Mega Stones. Have Lucario hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Tower of Mastery
• ManectiteMega ManectricItem ballOne variety of the mysterious Mega Stones. Have Manectric hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Route 16
• MawiliteMega MawileItem ballOne variety of the mysterious Mega Stones. Have Mawile hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Camphrier Town
• MedichamiteMega MedichamItem ballOne variety of the mysterious Mega Stones. Have Medicham hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Laverre City
• Mewtwonite XMega Mewtwo XItem ballOne variety of the mysterious Mega Stones. Have Mewtwo hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Unknown Dungeon
• Mewtwonite YMega Mewtwo YItem ballOne variety of the mysterious Mega Stones. Have Mewtwo hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Unknown Dungeon
• PinsiriteMega PinsirItem ballOne variety of the mysterious Mega Stones. Have Pinsir hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Santalune Forest
• ScizoriteMega ScizorItem ballOne variety of the mysterious Mega Stones. Have Scizor hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Frost Cavern
• TyranitariteMega TyranitarItem ballOne variety of the mysterious Mega Stones. Have Tyranitar hold it, and this stone will enable it to Mega Evolve during battle.Item ball · Cyllage City
• VenusauriteMega VenusaurGiftOne variety of the mysterious Mega Stones. Have Venusaur hold it, and this stone will enable it to Mega Evolve during battle.Gift · Lumiose City

Mega Stones

Item↕	Mega Evolves	Where to get it
Abomasite	Mega Abomasnow	GiftFrost Cavern
Absolite	Mega Absol	GiftKiloude City
Aerodactylite	Mega Aerodactyl	GiftAmbrette Town
Aggronite	Mega Aggron	Item ballCyllage City (Y)
Alakazite	Mega Alakazam	Item ballReflection Cave
Ampharosite	Mega Ampharos	GiftAzure Bay
Banettite	Mega Banette	Item ballChamber of Emptiness
Blastoisinite	Mega Blastoise	GiftLumiose City
Charizardite X	Mega Charizard X	GiftLumiose City (X)
Charizardite Y	Mega Charizard Y	GiftLumiose City (Y)
Garchompite	Mega Garchomp	Item ballVictory Road
Gardevoirite	Mega Gardevoir	TradeLumiose City
Gengarite	Mega Gengar	GiftLaverre City
Gyaradosite	Mega Gyarados	Item ballCouriway Town
Heracronite	Mega Heracross	Item ballSantalune Forest (Y)
Houndoominite	Mega Houndoom	Item ballRoute 16 (Y)
Kangaskhanite	Mega Kangaskhan	Item ballGlittering Cave
Lucarionite	Mega Lucario	Item ballTower of Mastery
Manectite	Mega Manectric	Item ballRoute 16 (X)
Mawilite	Mega Mawile	Item ballCamphrier Town
Medichamite	Mega Medicham	Item ballLaverre City
Mewtwonite X	Mega Mewtwo X	Item ballUnknown Dungeon (X)
Mewtwonite Y	Mega Mewtwo Y	Item ballUnknown Dungeon (Y)
Pinsirite	Mega Pinsir	Item ballSantalune Forest (X)
Scizorite	Mega Scizor	Item ballFrost Cavern
Tyranitarite	Mega Tyranitar	Item ballCyllage City (X)
Venusaurite	Mega Venusaur	GiftLumiose City