Unused content (SSB)
Super Smash Bros. was initially developed by Masahiro Sakurai and Satoru Iwata in their downtime, in a form titled Dragon King: The Fighting Game (格闘ゲーム竜王, Kakuto-Gēmu Ryūō), which lacked Nintendo characters. Sakurai, however, felt that the game could not provide the proper atmosphere on a home console without a recognizable cast. Nintendo characters were soon added and the game was redesigned and renamed. Only a few screenshots of Dragon King have been released, and no known video footage or working prototype has been released.
Below are the only known images of the game.
Bowser, Mewtwo and Marth would later on be playable in Melee, while King Dedede would later on be playable in Brawl.
The stage Meta Crystal and the stage for "Race to the Finish" both have spawn locations for all four players, implying that they might have been playable outside of the single player game mode. However, it could simply be a form of error handling, in the case someone hacks the game to play these stages in Vs. Mode.
Two stages have leftover data in Smash 64, and they can be accessed through use of the debug menu.
Initially, Crates lacked the Super Smash Bros. logo seen on the final versions' sides.