Pokémon AlphaOmega and RubySapphire

[NICKtendo DS]

You can trade between XY and ORAS. The only restrictions are new moves like Groudon/Kyogre/Rayquaza's and holding new items, like new Mega Stones. Everything else can be traded back and forth. I wonder if Latias/Latios' Mega Stone can be traded, seeing as their Megas exist in X and Y.