Since official game saves are stored on the Switch's internal memory and not the cartridge, you'll need to source a shared file from the community.
Now, grab your controller, pick Random, and enjoy the chaos. Everyone is here. Since official game saves are stored on the
: Relaunch the game. If successful, all characters, including DLC fighters (if you have the corresponding DLC files installed), should be available on the character select screen. Manual Unlock Shortcut grab your controller