>>19537947>The game's code has no more room for items.Items can be added, the 3DS supports patching
>If they were gonna give a mega to Diancie, a GEN SIX pokemon, why wouldn't they PUT IT IN THE FUCKING GEN SIX GAME?Were you under the impression that the 25 or so in XY would be the only Megas we'd ever get?
Pokémon change and get new features in every generation, and within generations. Mega Evolution is now one of those features.
It doesn't matter what game Mega Diancie debuts in, it's an Event Legendary not obtainable in normal gameplay anyway.
>Furthermore, why would they give a mega to a pokemon that hasn't even been fucking released yet?It's been revealed for a while now, and will have been released long before ORAS comes out.