Players can input a short string of characters as a name to use in gameplay, in which it will appear above the character. Names can be up to four characters long in Melee, up to five in Brawl, and up to ten in for Wii U and Ultimate.
The Records menu allows the viewing of separate records for knock-outs, self-destructs, damage taken, pratfalls and the like for each name. It is also possible to associate some controller preferences to each name, such as the Rumble option or - starting with Brawl - control schemes different from the default; this allows the usage of useful configurations such as A-sticking and Bidou.
In Brawl, names can be transferred to the Wii Remote and can then be transferred to another Wii console. KO Stars are temporarily awarded to a given name profile for scored KOs, lasting until the player exits Versus Mode or changes their name.
In Ultimate, names not only appear in the tag floating above the character, but also in their damage meter, replacing the character's name (unless when playing online, which instead displays the name of the Nintendo Switch's current user). A player's name tag also appears over any Assist Trophy or Poké Ball Pokémon that fighter has summoned.
Starting in Brawl, names appear on the multiplayer results screen, and in Ultimate, they appear in the fighter splash screen before a match starts.
In rare cases, names may affect gameplay. For example, in Melee, name tags remain visible even if they are pointing to an invisible character, making it easier to punish teleportation special moves such as Farore's Wind and Vanish.
In Super Smash Bros. for Wii U, due to the lack of voice chat when playing any of the With Anyone modes online, some players use names as a means of communicating with other players, sending messages such as "good game". However, griefers may change their name to something less appreciated, like "youretrash".
The Name Entry is a menu in which names are entered and managed. In Melee it is found in the VS. Mode menu, in Brawl under "Options" and in for Wii U in both places. New names can also be typed in at the character selection screen: in Melee this will bring up a separate name entry screen, while in Brawl, for Wii U, and Ultimate, a new name may be typed in directly (although controls cannot be set this way).
In the European version of Brawl, Latin uppercase and lowercase characters (including versions with diacritics) can be used, as well as punctuation and numbers. The PAL version of Melee allows the same possibilities. The NTSC version of Brawl allows uppercase Latin letters, punctuation, numbers and Japanese characters.
There is also an option to have the game enter a random name. Most of the random names that can appear are names of existing Nintendo characters.
The Name Entry will refuse to set names such as "CPU" and "P1", likely due to them being tags for players without names. However, variations with lowercase letters, such as "Cpu" and "p1", can be set. In Super Smash Bros. for Wii U, in addition to this, the Name Entry uses the Wii U's native word filter, preventing names with potentially inappropriate jargon from being set. Neither of these restrictions are present in Ultimate, partially due to the absence of a word filter on the Nintendo Switch.