CONFIRMED (Mega) Charizard (Mega) Ampharos Froakie 3rd stage POSSIBLE Flabébé if grass type evo. Eevee evo. (Mega) Alakazam (Mega) Gengar Bunnelby evo if incredibly awesome. Something not yet confirmed(duh)
Mewtwo, Charizard, Sora, Cloud, Roxas, Shadow from sonic, Heartless from KH, K.K. Slider, Isaac, Lucina, PKMN Trainer, or Reggie or no new sig. -6/28/13
Well you can only use one mega per team, so eh, good luck with that.
I can't, for the life of me, understand why people would find it desirable to run through a new game with the same, stale Pokemon (mega or not) who have been in the series for over 15 years. With that in mind, I'm going for an entirely Kalos-based team. So far, I know for a fact that I'm using Skrelp, Spritzee, the Amaura line and - if the new set of rumours are true - the Ground-type badger.