>>50868688We're long past that point, since multi-dimensional shit started happening with X/Y, and they went all in with Team Rainbow Rocket in Ultra Sun/Moon.
Legends Arceus also delves into it, with the space-time disturbances that allows characters and Pokémon that shouldn't appear in Hisui to appear, like Weavile, Porygon, Shieldon, Cranidos.
Pokémon Go is seemingly canon to the Pokémon multiverse now, it's currently the only source of Meltan for the Switch games, and the only place where you can evolve Meltan into Melmetal.
>In Pokémon GO, it evolves from Meltan by using 400 Meltan Candy. Meltan cannot be evolved in other games. 