Camerupt, while slow, is pretty strong. Especially in trick rooms. I've never seen anyone use mega steelix. Houndoom is a 50/50 chance. It's not used much, but can really do some damage, especially in the sun. Even Absol idk about. It took a while for us to get Absol through an event, so getting it's mega stone would take some work. What about Sharpedo?