Starting August 13, you can get Heracross for your Pokémon X game or Pinsir for your Pokémon Y game. These Lv. 50 Pokémon are ready for battle with a variety of powerful moves.
Heracross and Pinsir don't come with any held items. But from August 18 until August 31, you can head to participating GameStop stores to get Mega Stones for the Pokémon to hold! When these Pokémon are holding the right Mega Stone, they will be able to Mega Evolve during battle, making them more powerful than ever before. Look for a flyer at GameStop that contains a serial code. When you enter the code into your game, you'll receive the matching Mega Stone: Heracronite in Pokémon X or Pinsirite in Pokémon Y.