Getting a Meteorite in Pokémon Go isn’t easy as it’s a rare item you can’t obtain while exploring your local neighborhoods. There’s a specific way you can get one, and it’s a hefty requirement if you’re looking to give it to the only Pokémon that can use one: Rayquaza.
The Meteorite won’t always be available. You’ll want to check with the most recent events in Pokémon Go to see if there’s one you can grab. If there’s not, you’ll need to wait until the event rolls around. When you get a Meteorite, you’ll want to give it to a Rayquaza as this Legendary Pokémon needs it to evolve into Mega Rayquaza.