Super Smash Bros. 64 was originally called Dragon King

Super Smash Bros. 64 began life as a tech demo for a four-player free-for-all fighting game called Dragon King: The Fig…

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Super Smash Bros. - IGN

Dragon King: The Fighting Game (lost early prototype of Super Smash Bros. crossover fighting game; 1990s) - The Lost Media Wiki

Dragon King: The Fighting Game Mod Pack – SSBM Textures

ALERT! ALERT! Sakurai just showed us actual footage of the prototype for Smash 64 Dragon King: The Fighting game! This is not a drill I repeat, this is not a drill!

Dragon King - Smash Bros. Alternate Costumes by Big-Z-2015 on DeviantArt

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Masahiro Sakurai says that the Super Smash Bros. 64 prototype was initially developed to study the 3D tools of the Nintendo 64

Super Smash Bros. 64 quartets (Including the scrapped and rumored characters except Falco) : r/smashbros

Super Smash Bros. 64 was originally called Dragon King