If you prefer to "earn" them but want it done in under 2 hours, use this exploit to bypass the game’s 10-minute cooldown between challengers:
Smash Ultimate on Yuzu: How to Unlock the Full Roster Instantly Playing Super Smash Bros. Ultimate super smash bros ultimate unlock all characters yuzu
[Unlock All Characters v13.0.3] 04000000 0033C398 52804E20 04000000 0033C39C D65F03C0 04000000 0033C3D8 52804E20 04000000 0033C3DC D65F03C0 04000000 0033C450 52804E20 04000000 0033C454 D65F03C0 If you prefer to "earn" them but want
The fastest method on Yuzu is to bypass gameplay entirely by importing a pre-existing save file. super smash bros ultimate unlock all characters yuzu
The most efficient way to have the full roster immediately on Yuzu is to download and install a completed save file.