No........... Glalie has a Mega Evolution. Why....? Now it's going to be overused.
I always liked Glalie because it was a rare and special Pokemon to have in Emerald (after all, my internal battery died when Shoal Cave was at high tide, so I couldn't catch a Snorunt. Even if I could, I don't know if I'd really be willing to train it to lvl 40). Now that it has a Mega Evolution, everybody will be using it. Glalie's loss of rarity is going to make me like it a lot less.
I still like its design, though. Glalie along with its animation in Pokemon Emerald looked so... boss. A large floating head wearing an icy mask with holes in it, gritting its teeth like it's enduring the cold? It looks like a big, bad, cold-blooded thug. I'm totally going to name my Glalie "Ski Mask"
Its design reminds me a bit of Venom too