Pokemon X and Y introduced Mega Evolution through Mega Stones. Mega Evolution is one step above the max evolution of a Pokemon and is a temporary power boost as the Mega Evolution will wear out after the battle ends. So far we have 26 confirmed Pokemon that can be Mega Evolved but thanks to the power of the 3DS this could change. Developers Game Freak could easily add more via events (like the Torchic event) or DLC so keep a lookout for those.
Mega Stones are really useful as they help increase your Pokemon’s stats in battle, the downside is that you can only Mega Evolve one Pokemon in your party per battle. Still I really like Mega Evolutions as help competitive battlers as myself come up with new strategies to defeat the opponent.
The guide below will help you find all the Mega Stones obtainable in Pokemon X and Y:
Save Abomasnow in Frost Cavern and you’ll be awarded with a Abomasite.
Defeat your rival in Kiloud City after defeating the Elite 4.
You’ll get it from a scientist in the Ambrette Town Fossil Lab. He’s at the right side of the lab by the way.
Aggronite is exclusive to Pokemon Y and can only be found at Night in Cyllage Gym. To get it go right and climb the first wall, then climb the next wall on the right. It is on the ground around the corner.
Alakazite is also found at night on B3F of the Reflecting Cave after clearing the main game.
An old man on one of the Islands near Azure Bay will give this to you. The aforementioned old man is standing next to a fisherman, the Island is just south of the Sea Spirits Den entrance.
Found in the Chamber of Emptiness at night.
Given alongside Squirtle by Professor Sycamore when picking the Kanto Starters. You can also buy it from Stone Emporium in Lumiose City after clearing the game for 150,000, unfortunately it is only available every three days.
The Mystery Gift Event Torchic will be holding this.
Given alongside Charmander by Professor Sycamore when picking the Kanto Starters. You will get either the X or Y version of the stone depending on the version of the game you’re playing. You can also buy it from Stone Emporium in Lumiose City after clearing the game for 150,000, unfortunately it is only available every three days.
Found small tower near the end of Victory Road at night. The tower is behind a wall that can be destroyed by Rock Smash.
Trade any Pokemon with Diantha in Lumiose City to get a Ralts holding the stone. She can be found in Cafe Soleil.
Given by a woman with Black Hair in Lavarre City.
Found at night in the southeastern section of Couriway Town. The stone is in the middle of the three waterfalls.
Exclusive to Pokemon Y and found only at night. The stone is located in a patch of tall grass in Santalune Forest, somewhere around the Router 2 exit.
Exclusive to Pokemon Y and found only at night. You can find this Mega Stone in Route 16 near the two skaters skating around a rock formation. The stone will be on the ground on the southern side.
Also found at night inside Glittering Cave. Take the first right and keep going till you find the stone at the dead end.
Korrina gives you a Lucario holding this after you defeat her at the Tower of Mastery.
Exclusive to Pokemon X and found only at night. You can find this Mega Stone in Route 16 near the two skaters skating around a rock formation. The stone will be on the ground on the southern side.
Found at night once again. Go to Shabboneau Castle and take a left and go up stairs the stairs. The stone will be just north of the western staircase.
Found in Lavarre City, by a well at night.
Mewtwo will be holding the stone when you catch him in the cave west of Pokemon Village. Just like Charizard, the version of the stone depends on your game.
Exclusive to Pokemon X and found only at night. The stone is located in a patch of tall grass in Santalune Forest, somewhere around the Router 2 exit.
Found behind the Abomasnow in Frost Cavern at night.
Tyranitarite is exclusive to Pokemon X and can only be found at Night in Cyllage Gym. To get it go right and climb the first wall, then climb the next wall on the right. It is on the ground around the corner.
Given alongside Bulbasaur by Professor Sycamore when picking the Kanto Starters. You can also buy it from Stone Emporium in Lumiose City after clearing the game for 150,000, unfortunately it is only available every three days.
Also do note that the post game Mega Stones can only be found between 8pm and 9pm.