Would be interesting if its Mega evolution essentially swapped its Defense and Special Defense stats (well, maybe "only" drop its SpD to base 40; it needs to be worth giving up another Mega slot on the team and make up for losing Lefties.)
Most of the time classic Blissey would be better, but when you do use the Mega form you can completely turn the tables on the counter they are bringing in on you.
We're the only Marvel title that features squirrels. And do you really want a squirrel-free comic? I don't think so. - Dan Slott, on GLA