Bonus Stage
A Bonus Stage (also known as a Bonus Game) is a special mini-game found in the various Classic Modes (or 1P Game in the original) of the Super Smash Bros. series. They are used to interrupt the battle set-up, serving as a sort of "break" round. Completing the stage gives players bonus points that are added to their final score; additionally, completing some Bonus Stages under certain circumstances can unlock hidden elements of the game. Bonus Stages are often optional and do not have to be successfully completed to complete the mode.
In these games, the player is required to complete a certain task within a certain time limit and with only one life. Some bonus games feature custom arenas, designed specifically to test one's skill with a particular character and/or play to their strengths and weaknesses, while others use one universal stage.
In Super Smash Bros.
Three bonus games are available in the 1P Game of Super Smash Bros., once every three battles: Break the Targets, Board the Platforms, and Race to the Finish. The main game can progress even if the player loses the first two bonus games, but Race to the Finish must actually be successfully completed to continue.
In Super Smash Bros. Melee
Melee also features three bonus games. Target Test and Race to the Finish return as the first and third game, but Board the Platforms does not, being replaced by Snag the Trophies.
In Super Smash Bros. Brawl
In Brawl there is only one bonus stage: Target Smash!!, which appears twice after the fourth and tenth battles. The second time features a higher difficulty than the first, unless the first difficulty was already the highest.
In Super Smash Bros. Ultimate
Ultimate's Classic Mode features a stage named simply Bonus Game. This is a challenge in the style of Race to the Finish, but rather than having a time limit, the player must outrun a void of darkness that consumes the stage behind them. Glowing orbs in the stage can be collected to increase the players score. At the end of the stage there is a cannon that eventually leads to a portal which ends the bonus game.