Pokémon Pokopia’s Bubbly Basin DLC contains six treasure maps, found by digging daily glowing spots, which lead to hidden human-made items and help unlock the unique “mermaid’s gym” habitat. Players do not need to obtain a map before visiting its treasure location.

– Treasure Map #1: Decorative Great Ball, behind blue rocks beside the Bubbly Basin Pokémon Center’s bathing house.
– Treasure Map #2: Decorative Heal Ball, in an underground room northeast of the ocean temple.
– Treasure Map #3: Decorative Dive Ball, behind star-spotted rocks south of the abandoned gym.
– Treasure Map #4: Decorative Net Ball, in a cave northwest of the main square.
– The article states that six maps are available exclusively in the DLC.