This is the defining feature of Brain vs. Brain . It allows players to compete against the "ghosts" of other players (friends, family, or strangers online). Even if a friend isn't online, you can compete against their recorded high-score run. It creates an asynchronous multiplayer experience similar to time trials in racing games.
Instead of direct online play, you can battle "ghost data" (play recordings) from friends or players worldwide. Big Brain Academy Brain vs Brain -NSP--eShop- -...