Pokémon Pokopia gives players free swimming move August 5; underwater area costs extra

On August 5, a free update for Pokémon Pokopia on Nintendo Switch 2 gives every player the Dive move, which lets Pokémon swim underwater. But the underwater area you can explore with it — which looks like old Cerulean City — is only available with a $35 pass that also covers two future add-ons and can't be bought by itself.