Super Smash Bros. Ultimate is a fighting game developed by Sora Ltd. and Bandai Namco Studios, featuring a vast array of characters from various Nintendo franchises, including Mario, Zelda, Pokémon, and more. The game boasts an impressive roster of over 70 characters, each with their unique movesets, stages, and music. The game also introduced a new "Spirit" system, which allows players to collect and equip spirits to enhance their gameplay experience.
via an XCI file, you generally need more than just the base file: Base Game (XCI): The core 13–15 GB file containing the original game data. super smash bros. ultimate switch xci
SSBU has received numerous balance patches and character additions. These are often distributed as separate files that must be installed on top of the XCI. Super Smash Bros
So why choose XCI? Three reasons: