Starting today, all of the Pokémon from the Johto region can be found in Pokémon GO. Update now and catch them today! Also, for those of you with Pokémon Sun and/or Moon, The Pokémon Company has announced how the missing mega stones can be acquired. Certain mega stones will be given to the participants of online competitions while others (most likely the Mewtwonites and Diancitite) will be distributed to everyone via permanent events similar to the Magearna event. I'll have more info on the mega stones as soon as it's announced (and reported on by Serebii).