The notice, visible briefly online, lists Bubbly Basin as the first batch of DLC for the title and confirms an Expansion Pack for the game is available for purchase on the Nintendo eShop.
Background
Pokémon Pokopia has added downloadable content to its roadmap, with Bubbly Basin positioning itself as the initial post-launch expansion.
According to the advert, which was later removed from public view, the Bubbly Basin DLC carries a release date of 5 August.
Separate from the pulled advertisement, the game currently has an Expansion Pack listed on the Nintendo eShop, the digital storefront for Nintendo Switch players.
Reported announcement and implications
The advert—now private—explicitly named Bubbly Basin and detailed its 5 August release.
In journalistic terms: an official marketing spot for Pokémon Pokopia briefly revealed that the first DLC drop, Bubbly Basin, is scheduled to go live on 5 August, and the same messaging confirmed the existence of an Expansion Pack available via the Nintendo eShop.
The communication indicated that Bubbly Basin is the initial installment of DLC, with additional content planned for future release windows.
How to prepare as a player
Nintendo eShop remains the distribution channel noted in the advert for the Expansion Pack purchase; Switch owners should monitor the eShop and the game’s official channels for store updates and patch notes.
Developers and publishers commonly use the eShop and event presentations such as Nintendo Direct to stage DLC announcements and release information, so those are logical places to check for confirmation and pricing details.
Conclusion
With Bubbly Basin slated for 5 August and an Expansion Pack already appearing on the Nintendo eShop, Pokémon Pokopia is entering its first post-release content phase.
Players looking to download Bubbly Basin or purchase the Expansion Pack should watch for an official follow-up from the game's publisher or its storefront listing to confirm availability, pricing, and platform specifics.