With many Mega Evolution Pokemon.
Nintendo has announced the release date for Pokemon Omega Ruby and Alpha Sapphire at November 21st. There’s also a nice E3 trailer that finally show in-game footage of the game:
The game also gives us first look at Mega Sceptile and Mega Swampert. It’s also confirmed that Kyogre and Groudon will be receiving some sort of Mega Evolution as well that returns them back to their ancient appearance- Primal Kyogre and Primal Groudon.