From August 13th – September 17th, The Pokémon Company will distribute a special Heracross for Pokémon X and a special Pinsir Pokémon Y via Wi-Fi. Both Pokémon were previously exclusive to the the other game.
Additionally, if you happen to visit a GameStop store in the U.S. from August 18th onwards, you can grab yourself a Mega Stone to Mega Evolve (above) the two Pokémon. Further details on the two can be found below.
Heracross – Lvl. 50:
Moves: Bullet Seed, Pin Missile, Close Combat, and Megahorn
Ability: Swarm or Guts (changes to Skill Link during Mega Evolution)
Pinsir – Lvl. 50:
Moves: X-Scissor, Earthquake, Stone Edge, and Return
Ability: Hyper Cutter or Mold Breaker (changes to Aerilate upon Mega Evolution)
Finally, it has also been revealed that pre-orders of Pokémon Omega Ruby and Pokémon Alpha Sapphire will come with a pre-order poster while supplies last. Both those games will be released on November 21st in North America.