Unfortunately theres no real way to ensure you encounter a shiny Meltan so whether or not you get one ultimately comes down to luck. Your best bet to find one is to open the Mystery Box as many times as you can during the event and catch every Meltan that appears.
How to get Shiny Meltan in Pokemon Go Return date Mystery Box and ...
07/06/2022 — Meltan is an exclsuive Mythical in Pokemon Go and here is how players can obtain Mystery Boxes to get its rare Shiny form.
Pokemon Go How To Find (& Catch) Shiny Meltan - Screen Rant
14/01/2022 — The best way to increase the chances of finding a Shiny Meltan is to use the Mystery Box and focus solely on capturing Meltan. Its completely ...
Pokémon GO How to Find & Catch Shiny Meltan (Mystery Box)
08/06/2022 — It will need a whooping 400 Meltan Candy to get it to evolve into a Shiny Melmetal in Pokémon GO. Using a Pinap Berry with each Meltan encounter ...
Pokemon GO Where to Find and How to Catch Shiny Meltan
06/06/2022 — So the best way is to use the Mystery Box and solely focus on capturing Meltan. Although the Shiny form will be taken away once the anniversary ...
Pokémon GO How to get Shiny Meltan (2022) - Pro Game Guides
22/06/2022 — Once players have gotten their hands on a Mystery Box it can be used to spawn Meltan. There will be plenty of chances to encounter a shiny ...
Meltan Event Unbolting the Limited Time Shiny Rate! | The Silph Road
21/10/2022 — Shortly before the Lunar New Year we heard exciting news shiny Meltan had been discovered! Always eager to gather more information on ...