It is originally known as Dragon King: The Fighting Game
One source states, "It's hard to believe now, but what we know as Super Smash Bros. was originally conceived as something else entirely. Game designer Masahiro Sakurai was interested in making an original fighting game, and from that idea he created a presentation for a game he called Dragon King: The Fighting Game.
He presented it to Satoru Iwata, who showed interest in the concept. Sakurai eventually came up with the idea to include Nintendo characters so that the game would have more marketing appeal. Thinking he wouldn't get permission from Nintendo, he designed the prototype in secret and didn't show them until it was well-balanced. When he finally showed it to Nintendo, the game was immediately green-lit alongside the character swaps, and the rest was history"(Jacobs).
