Mega Evolution is one of the most important discoveries ever in Pokémon games, a phenomenon that allows certain Pokémon to evolve during battle to levels never before seen. In addition to increased stats, some Mega-Evolved Pokémon will see their Abilities and types change. But for a Pokémon to Mega Evolve, you need to have the Pokémon hold its corresponding Mega Stone.
Now you can find every Mega Stone in your Pokémon X or Pokémon Y game with a handy Mega Stone Collection Guide! This colorful four-page guide gives you directions to all the Mega Stones that you can find in your game, as well as a map of the Kalos region to help you begin your search.