Cause: Sony has deactivated the legacy ad-hoc server for Danball Senki W in many regions. Fix: Abandon cloud cross-save. Instead, use Adrenaline (on Vita) to run the PSP version directly, or manually copy the save via FTP (FileZilla + Vita FTP server).
You can find several community-created saves online (e.g., on GameFAQs or Nexus). These typically feature: danball senki w save data
Danball Senki W (known as Little Battlers eXperience W in the West) is an action role-playing game developed by Level-5. Released for the PlayStation Portable (PSP) and PlayStation Vita (PS Vita), the game introduced a unique save data transfer system that allowed players to continue their progress across both handheld platforms. This paper examines the structure, utility, and limitations of the save data system in Danball Senki W, focusing on its role in cross-saving, New Game Plus features, and data compatibility with the original Danball Senki (2011). Cause: Sony has deactivated the legacy ad-hoc server