>>24807676The game's world changed every few months, I don't really consider that to be "just there".
Pokémon changed forms, other Pokémon were more common in some seasons and completely absent in others, you could only reach some items in Winter.
I'd like it if GameFreak brought back and fine tuned this mechanic.
Imagine if the world changed even more (smaller bodies of water freezing over) and if they were able to make it seem as if some Pokémon were migrating or hibernating during some seasons.