Each game in the series has a number of playable characters called "fighters". These characters are mostly from Nintendo series. There are currently 85 fighters in the entire series. Starting with "Super Smash Bros.Brawl", characters from non-Nintendo series started being added. There will also be 3 more in "Ultimate", but they haven't been added yet. At the start of each game, some of the fighters will be hidden. To unlock a hidden fighter, players need to reach certain goals and then defeat that fighter in a match.