The subtitle is a play on words. "Purapura" is an onomatopoeia for fluttering or swaying, but in the context of the Nintendo Switch release, it signifies the portability of the console.
: The shift from a single-platform release to the cross-platform (Switch/PS4) expansion in December 2019. Expansion Mechanics : Analysis of the "Update vs. DLC" model used by Level-5. Cultural Impact & Localization yokai watch 4 purapura switch nsp jpn dlc up link
When searching for a digital copy, ensuring the DLC is included (often pre-installed in the NSP file) is crucial for the full experience. The subtitle is a play on words
: While the base game can be updated to version 2.0+ for free (changing the icon and title screen), the actual yokai watch 4 purapura switch nsp jpn dlc up link