Super Smash Bros. Ultimate will receive a patch on launch day in order to fix issues with its game replay system.
In an interview with Famitsu, via ComicBook, game director Masahiro Sakurai said that the patch would be necessary for anyone purchasing the physical version of the game, while those downloading the digital version would have it included with their initial installation automatically.
According to Sakurai, the patch prevents replays from “going off-track,” and noted that you can save your replays as videos and keep them on your system indefinitely, if you have enough storage space.
Source: IGN.com Super Smash Bros. Ultimate Gets Day One Patch to Fix Replay System