CoroCoro reveals Mega Metagross
The latest issue of CoroCoro has revealed that Metagross will be able to Mega Evolve into Mega Metagross in Pokémon Omega Ruby and Alpha Sapphire. Mega Metagross will be used by Steven Stone as Champion. Steven Stone has the Mega Lapel Pin as his Key Stone item.
Update: Additional images have surfaced, revealing Brawly's new design as well as something referred to as "Madame Pikachu". Additionally, Pokémon-Amie will return in Pokémon Omega Ruby and Alpha Sapphire. The new Hoenn Pokédex resembles a Game Boy Advance.
Update 2: Additional images have surfaced, revealing the designs of Roxanne, Brawly, Wattson, Flannery, Norman, Sidney, Phoebe, Steven and Professor Birch. Five alternate costumes of Pikachu appear in the game, being Madame Pikachu, Hard Rock Pikachu, Masked Pikachu, Doctor Pikachu and Idol Pikachu. Hard Rock Pikachu is shown participating in a Pokémon Contest.
Update 3: Another image has surfaced, revealing that Mega Diancie's Ability is Magic Bounce. Also, players of The Thieves and the 1000 Pokémon who see Diancie and the Cocoon of Destruction in cinemas will be able to download a special stage; after clearing that stage, players can transfer a Master Ball to their Pokémon X or Y game.