At least, not in OR/AS anyway.So now we know everything about the new megas, etc. in ORAS. This reveals a very sad truth: Unless there are megas in the full games that are not in the demo (which seems unlikely; why would GF add data for Megas other than Steelix, Glalie, Sceptile, Swampert, and Blaziken?), we will not be seeing Mega Flygon or Milotic.
Also, I find it oddly amusing that only Primal Groudon and Kyogre really gain brand new shiny colors (Glalie and Audino barely change at all...) and they simply adopt Rayquaza's shiny colors. I suppose a lot of people are now going to be RNG'ing them in Luxury Balls from previous games to be shiny to match this.