Updates were delivered via format for digital distribution, moving the game from its launch version to the final balance state in Ver. 13.0.1 . Super Smash Bros. Ultimate Update History | Nintendo Switch
Do not install an update that requires a higher firmware than your Switch is running. Smash v13.0.3 usually requires Firmware 16.1.0 or higher. Super Smash Bros. Ultimate Switch NSP UPDATE DLC
For users with modded hardware or those using emulators like Sudachi or Ryujinx, several tools facilitate file management: Updates were delivered via format for digital distribution,
You only need to install the most recent update file to receive all previous improvements, balance patches, and compatibility features. Essential DLC Contents and compatibility features. Essential DLC Contents