
Mega Gardevoir: In the Lumiose City southern boulevard cafe, you can trade for a Ralts. Mega Blaziken: When you get Torchic from the event giveaway, it’ll come with this stone, Blazikenite. Mega Tyranitar: You can find this stone, Tyranitarite, in the Cyllage Gym during the post-game. Mega Houndoom: You can find this stone, Houndoomite, in Route 16 during the post-game. Mega Heracross: You can find this stone, Heracronite, in Santalune Forest during the post-game. Mega Scizor: You can find this stone, Scizorite, in the Frozen Cavern located behind Abomasnow. Mega Ampharos: You will be given this stone, Ampharosite, in Azure Bay. He’s located in a cave in the Pokémon Village that requires Surf to access. Mega Mewtwo X and Y: Mewtwo is holding this stone, Mewtwonite X or Y, upon capture. Mega Aerodactyl: You will be given this stone, Aerodactylite, in Ambrette Town. Mega Gyarados: You can find this stone, Gyaradosite, in Couriway Town during the post-game. Mega Pinsir: You can find this stone, Pinsirite, in the Santalune Forest during the post-game. Mega Kangaskhan: You can find this stone, Kangaskhanite, in the Glittering Cave during the post-game. Mega Gengar: You will be given this stone, Gengarite, in Laverre City. Mega Alakazam: You can find this stone, Alakazite, in the Reflecting Cave, floor B3F, during the post-game. If not, you can pick it up at Vernal Avenue Stone Emporium in Lumiose City. Mega Blastoise: If Squirtle is chosen as your second starter, it comes with its Mega Stone, Blastoisinite. Mega Charizard X and Y: If Charmander is chosen as your second second, it comes with its Mega Stone, Charizardite X or Y.

Mega Venusaur: If Bulbasaur is chosen as your second starter, it comes with its Mega Stone, Venusaurite. Image: nintendo Pokémon X Mega Evolutions
