The Treasure Maps in Pokopia Bubbly Basin lead you to six hidden decorative treasures scattered around Cerulean City. Although the maps do not pinpoint the exact locations of these decorations, it is worth searching for them since you will require all the decorative items in order to access the habitat of the Mermaid’s Gym. In this guide, we’ll show you where to find all six Treasure Maps.
All 6 Treasure Map Locations in Pokopia Bubbly Basin
In your adventure in Cerulean City, you will find six maps that contain Treasure Maps. The maps are simply drawn and provide you with a hint as to where the treasure could be buried in the past. You must have a Pokémon equipped with the Search Speciality and use the Dowsing Machine to find the buried treasures.
You need to collect all six decorative treasures to gain access to the last habitat, Mermaid’s Gym. When you find all the treasures, you will unlock the recipes for the same. You can get the required recipe by visiting the special shops each day and making the decoration.
Great Ball



Go to the building located west of the Pokémon Centre, and go to the back where you will find a water wheel. At the eastern side of the building, there is a breakable wall. Break it, and you will find a Decorative Great Ball in a hidden room.
Heal Ball

Go east on the map until you spot the pagoda that has the windmill rising from the water. Follow the way westwards from there, and dig up the floor to access the hidden room that has the Decorative Heal Ball.
Dive Ball



Head over to the Cerulean City Gym from the time of your past. In front of the gym, you will find rocks that have spots on them resembling stars. You have to break them to access the Decorative Dive Ball.
Net Ball


Revisit the cave in which you encountered Frillish for the first time. Proceed in the cave until you find yourself in the mining part of the cave. Head east near the big crystal, then smash the rock wall ahead of you, and you will find the Decorative Net Ball.
Lure Ball


Go north on the map to the location of Bill’s House, which is easily recognisable due to the green roof. From there, head west to where there is only one patch of tall grass right next to the cliffs. There is a secret room under there that holds the Decorative Lure Ball.
Quick Ball

Following the direction from the gate you came in through, move north, and then take a left turn. You will find the remains of an old building where there are Star-spotted rocks blocking your path. Destroy the rocks and find the secret passageway leading to Decorative Quick Ball.
How to Use the Decorative Pokeballs
In order to make the Mermaid’s Gym display at Pokémon Pokopia, you will have to get the six Decorative Pokéballs. Each ball needs a separate pedestal, so by placing each ball, you fill another place in your display. In addition to the six Decorative Pokéballs, you will require a Marine Sofa and six Exhibition Stands as well. After placing the Decorative Great Ball, Heal Ball, Dive Ball, Net Ball, Lure Ball and Quick Ball in their respective pedestals, the complete Mermaid’s Gym display will be ready. Finishing this display also unlocks Starmie’s habitat.
