If you want to start a completely new game:
In this article, we will explore everything you need to know about starting a with advanced save data, what "New Game+" features exist in the wild, how to properly install new save files, and the ethical considerations of using community-shared data in 2024-2025.
When starting a new game in Danball Senki W , you can import cleared save data from Danball Senki BOOST (PSP).
The Danball Senki Wiki notes that these are obtained by selecting the import option at the start of a new game. Post-Game & Clear Data