DUMMY

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DUMMY is a stage which can only be found via Action Replay. When activated in Debug Mode, it normally crashes the game, though another hack can force the game to present the stage. It merely consists of empty space, save for a lone invisible platform in the center that can only be seen using the debug menu.

A somewhat popular technique used in DUMMY is to add blast lines, which the stage normally does not have, and then activate an infinite-double-jumping hack, allowing for a midair fight.

[edit] Trivia

• An area resemblant to DUMMY appears in the Super Smash Bros. Brawl trailer, before changing into the Battlefield stage from said game.
• It's possible this stage is used when characters do their victory poses.
• It's possible that this stage is used for the background in the Debug Mode.