I had a dream about it being underwater (weird) and the protagonist (me?) having to survive getting past it, only for a bomb to go off. Thanks for jogging my memory.
My opinion: It's ugly, but in a cool way due to its sheer size. The Mega adds nothing of worth.
Cool design (both Xerneas and Yveltal are the best looking mascots excluding the first two generations), but the lore is a bit iffy. Is Xerneas supposed to counter it? Does its power rival the Ultimate Weapon? Why isn't it well known in Kalos?
@Envoy Agreed, but I'd add Weavile and...