Mermaid's gym habitat
Bubbly Basin habitat #036
To make mermaid's gym in Pokopia, place 1 Marine Sofa, 6 Pedestal, 1 Decorative Great Ball, 1 Decorative Heal Ball, 1 Decorative Dive Ball, 1 Decorative Net Ball, 1 Decorative Lure Ball, and 1 Decorative Quick Ball together. It attracts Starmie.
This space with a shining pearl sofa feels ready for someone to arrive.
Items to place
Marine Sofax1
Pedestalx6
Decorative Great Ballx1
Decorative Heal Ballx1
Decorative Dive Ballx1
Decorative Net Ballx1
Decorative Lure Ballx1
Decorative Quick Ballx1

Pokémon it attracts
A Pokémon only appears once its region, time and weather line up. Find any of them by condition in the spawn finder.