So I have an Altaria with cotton guard, refresh, and roost, but I can't decide to fill the last slot with Moonblast or Dragon Pulse. (It's not a competitive build just for a oras playthrough). Dragon pulse provides a decent stab move at all times, but Moonblast gives it a much better stab move when mega evolved. The problem is I'm not sure how often I'll mega evolve my Gyarados over my Altaria. So Moonblast or Dragon Pulse?