Sometimes you want to battle a family member or friend, but schedules just don't line up. If that's the case, you can always battle against a Ghost! You can just start battling against family and friends whenever is convenient for you without needing to worry arranging a time.
What are "Ghosts"?
Play data that shows records of how each player is doing in brain-flexing activities.
Data from friends and family members playing on the same Nintendo Switch™ can be used to create Ghosts, so you can indulge in battles despite the time difference.
To compete against Ghosts of far-flung friends, you'll need to join Nintendo Switch Online (a paid service). * Nintendo Switch Online is unavailable in your region.