Sparkling Skylands in Pokopia

The Sparkling Skylands are what happened to Celadon and Saffron when the catastrophe hit: the ground went up rather than under. It is a large area and it reads very differently from the rest of the map, since you spend it walking on land that has no business being at that altitude.

The job here is rebuilding Silph Co. Not restoring the old tower exactly, but putting up something new in its place, with the aim of making the area somewhere humans and Pokémon can live again.

It is the most ambitious build the main game asks of you, and it needs a broad Pokémon roster rather than one specialty repeated, so it tends to be the point where the habitat side of the game clicks.