DUMMY is a stage in Super Smash Bros. Melee which can only be found via Action Replay. When activated in the debug menu, it normally crashes the game, though another hack can force the game to present the stage. DUMMY is primarily composed of empty space over a black background, save for a lone invisible platform in the center that can only be seen using the debug menu. Unusually, the stage lacks any blast lines, making it impossible to be KOed on the stage, and it is the one of two stages in the entire series to lack them, the other being the Test Room in Super Smash Bros. 4.
The purpose for DUMMY is unknown; while TEST has been speculated to be programming tests, DUMMY has nothing to show what it was used for. It has been speculated, however, that the stage is used for the victory screens, the background of the debug menu, and the start of the E3 trailer of Brawl, among other theories.