Pokémon Pokopia will receive a free update and its first paid expansion on 5 August 2026, introducing underwater gameplay to the life-sim spin-off for the first time. The free update grants all players the new Dive ability, courtesy of an in-game visit from the Mythical Pokémon Manaphy, letting their Ditto avatar breathe underwater and build on the seabed much as they currently do on land, with their collected Pokémon able to swim alongside them.

The paid content, called Bubbly Basin, costs $34.99 as part of the Pokémon Pokopia expansion pass and adds the game's first post-launch region, a submerged town where players can meet water-type Pokémon such as Popplio, Mudkip and Corsola, grow underwater crops, and explore neon-coral-lit caves. The expansion also brings new furniture, collectible items and a Sharpedo-shaped submarine base, and the pass covers two further expansions, one due later in 2026 adding Pokémon accessories and another in 2027 adding a new town.