In the beginning, there was the universe; a vast endless sea of a void, to which time had no meaning or relevance.
It was from this void, that three forms would arise. The first was the Goddess, who wished to see life flourish amongst the realm. The second was a being known as the Master Core, who wished to oversee life and manipulate events that transpire in the worlds within. The third entity, was Tabuu, the ruler of the subspace, where all worlds meet their end.
There was harmony among the three entities, until the events of time heralded a great change that would bring disruption and chaos. The ancients speak of a history that tells the tale that the Master Core, when delegating it's Master Hand, lost to twelve divine heroes in its first incarnation of the universe's trophy wars.
Unhappy with this, the Master Core created a second incarnation of the trophy wars, a divine melee that saw twenty three heroes rise to the threat of Master Hand, its left counter part, crazy hand, and the two villains: Bowser, king of the koopas, and Ganondorf, the dark king of the Gerudos.
After two defeats of the hands of these heroes, the Master Core was weakened. Tabuu, watching from subspace, saw this weakness as a means to exploit it and began to conquer the living world.
Tabuu bound Master Hand and Crazy hand to its cause, and persuaded the villains to join its crusade. For a moment, all hope was lost, until the Goddess, seeing the events transpire, gave light and hope to thirty heroes to fight back against the countless hordes of the subspace. Because of Tabuu's cruelty, the villains themselves begrudgingly joined the heroes to help save the worlds, and thus the thirty five warriors saw Tabuu defeated and sent back to the subspace from whence it came.
For a time, there was peace, more fighters would emerge and take part in the world's fighter tournament, a tournament that they affectionally called "Super Smash Bros.". However, that tranquil peace that was once enjoyed would soon be shattered, and the events would give rise to a new calamity, the likes of which none of our heroes would have ever encountered before.
The ancients call this calamity, the wrath of the Master Core. However, to those that had lived to fight in this calamity, it is most commonly known as the era of "The World of Light".