As characters take damage, they are sent flying further by attacks, and if they fly - or fall - out of the arena, then they're out! The basic formula is unchanged since the previous title: up to four characters, controlled by either human players or the computer, duke it out in a side-scrolling arena. for Nintendo 3DS is the fourth entry in Nintendo's crossover fighting franchise, featuring dozens of characters from across Nintendo's catalog, along with a few special guests.