well, to me, there is only one clue pointing toward the fact that ORAS is before X/Y : the O-Power creepy guy.
but, even though, we are talking about a world where you can carry a 14.5m long whale or a ton weighting lizard in a small ball and transfer them instantly via any computer... they achieved miniaturiztaion, teleportation, instant resurrection, and (most impressive of all) anti-gravity. so, yes, wynaut time travel, there are already two pokemons for that after all...
