The latest trailer for Pokémon Omega Ruby and Pokémon Alpha Sapphire has been released showing off the Mega Pokémon that were revealed in CoroCoro this month.
The trailer confirms the return of Horde Battles to the game after they were introduced in Pokémon X and Pokémon Y. The video also confirms that the Shiny Beldum holding the Mega Stone for Metagross will be given away as a Wi-Fi event on the same day the games are released in Europe and the US.
The official Pokémon site for Pokémon Omega Ruby and Pokémon Alpha Sapphire have also revealed some of the stat boosts that our new Mega Pokémon get. Mega Lopunny gains a boost in Attack and Speed. Mega Salamence gains a good deal of Defense, and Mega Altaria gets a boost in Attack, Special Attack and Defense.