The Pokémon GO Ozone Ascent event is now underway, giving Trainers until July 26 at 8 p.m. local time to complete limited-time Timed Research centered on Rayquaza. All players can access free Timed Research that rewards a Meteorite, an encounter with Rayquaza and additional bonuses, while a paid US$4.99 Timed Research ticket adds another Meteorite, Rayquaza Mega Energy, another Rayquaza encounter and extra event rewards. Meteorites are required to teach Rayquaza the Charged Attack Dragon Ascent, which is necessary before the Legendary Pokémon can Mega Evolve, making the event a key opportunity for players looking to strengthen their Mega Rayquaza. All Timed Research tasks and rewards must be completed and claimed before the event concludes on July 26.
Source: Official Pokémon GO blog and Pokemon.com
Source:Pokémon
