New characters cannot be read by the base game without the accompanying compatibility patch. To unlock and play as DLC fighters, your base game must be updated to the corresponding version number. Deep Dive into DLC: Expanding Your Roster
Downloading and playing NSP files of games you do not own is piracy. This article is for informational and educational purposes only, aimed at understanding file structures and update management for legally owned copies (e.g., for backup or modding purposes). my hero ones justice 2 switch nsp update dl
For on Nintendo Switch, the most reliable and legal way to obtain updates and DLC is directly through the Nintendo eShop . Downloading game files (like NSP or XCI) from unofficial third-party sources can lead to security risks or system bans. Official Update & DLC Content New characters cannot be read by the base