is a crossover fighting game developed by Bandai Namco and Sora Ltd., published by Nintendo. The NSP (Nintendo Submission Package) format is the digital distribution format used by Nintendo eShop titles. The “base game part” refers to the core game data without any post-launch updates or DLC.
Because Super Smash Bros. Ultimate is a massive game—requiring approximately of free space for the digital version—the NSP is often split into multiple "parts" for easier downloading and storage. super smash bros ultimate nspbase gamepart