>>14123538The way I see it:
X Mega: alright physical attacker, moves that make contact will do a bunch of damage, still vulnerable to Stealth Rock when you sent it out, Dragon still has to fear pokes carrying Fairy moves (I bet an Fairy-type Energy Ball if not a Fairy-type Surf will get released).
Y Mega: still weak to Stealth Rock, but Fire moves will deal way slightly more than X Mega, the selective activation of Drought allows winning weather wars very, very easily