Quoted By:
Dragonite
Breloom
Mamoswine
An Ice type, maybe Froslass?
Actually, Froslass has the potential to be really freaking good with a Mega.
What I really want though, is more defensive Megas to cushion the insane power creep. Water / Fairy Mega Milotic will be great, but we need more defensive behemoths to handle all of the offensive monsters.