Erase Data, previously known as Backup Clear in Super Smash Bros., is an option in the first three installments of the Super Smash Bros. series. It allows the player to erase any specific data in the game, such as high scores, trophies, unlockable characters, and unlockable stages. In all three appearances, the option to erase singular categories of data is available, alongside an "Erase All" ("ALL Data Clear" in Smash 64) option.
If the player chooses to erase all data, there is no way to recover it when erased. As such, Super Smash Bros. Melee advises players to create a copy of the data onto a separate memory card. However, this is only possible in Melee. The game data is directly saved to the Nintendo 64 game cartridge for Smash 64, and the game data cannot be copied from one Wii to another (nor to an SD Card) in Brawl.
Neither Super Smash Bros. 4 nor Super Smash Bros. Ultimate have an "Erase Data" option, making it impossible to selectively erase any specific data. In both versions of Smash 4, players can erase all data by holding A, B, X, and Y (though in the Wii U version, it only works with the Wii U GamePad) on the startup and selecting "Yes" three times when prompted (just like in Brawl for "Erase All"). In Ultimate, the player can manually erase all data under the "Manage Save Data/Screenshots and Videos" option of the Data Management section in the Nintendo Switch's System Settings; due to this, a such built-in application is not included.