Super Smash Bros Ultimate - Save Data for Nintendo Switch - No

You have to upload your save file via Nintendo Online service.

Nintendo Switch™ - OLED Model: Super Smash Bros. Ultimate Bundle (Full Game Download + 3 Mo. Nintendo Switch Online Membership Included)

3DS smash bros is so passive aggressive about resetting data : r/smashbros

Super Smash Bros.™ Ultimate for Nintendo Switch - Nintendo Official Site

Gaming icons clash in the ultimate brawl you can play anytime, anywhere! Smash rivals off the stage as new characters Simon Belmont and King K. Rool

Super Smash Bros.™ Ultimate

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