The first one is being worked on (at least for the Pokedex pages), but will take time as it's not currently given in guides and the games can't be hacked to find out such info. I don't know Serebii's plans on the mega stone location thing.
Not many, but I'm gettin the hang of it. I'd say probably about 10 or so. And I think I do. If not, I'll get you another one of each. I don't think I still have the Elgyem you let me hold though, but I don't need the Smeargle back anymore. Lol!