https://techcrunch.com/2023/02/27/pokemon-go-gets-integration-with-scarlet-violet-plus-pokemon-sleep-update/

On Monday’s Pokémon Presents livestream, the company behind the hit megafranchise announced an integration between its latest main series games, Pokémon Scarlet & Violet, and the Niantic-produced mobile hit Pokémon Go. The Pokémon Company also shared a long-awaited update on its sleep-tracking app, Pokémon Sleep.

Already in Pokémon Go, players can obtain regional variants of the butterfly Pokémon Vivillon by collecting in-game postcards from other trainers around the world. Now, Pokémon Go players can send those postcards into their Pokémon Scarlet and Violet games on the Nintendo Switch, which will cause that specific Vivillon variant to spawn. Then, on the Pokémon Go side, this will trigger the Pokémon Gimmighoul to appear in its roaming form. Normally, Gimmighoul can be caught as a Pokémon that lives inside of a treasure chest, which is also part of its body (yes, it’s weird, don’t ask), but in roaming form, it’s just a silly little grey guy with a golden coin. The Pokémon can evolve into Gholdengo after trainers collect 999 Gimmighoul coins.