Eons ago a virus was brought forth from space down to Earth, much like the shape shifting Pokémon, better known as Deoxys, and very much like the DNA Pokémon, this virus was within a meteorite, however, unlike Deoxys, it took no form as a living organism, but as a sealed mist, striking within the area known as Undella Bay, which in turn unleashed a wave of chaos with its arrival.

With the release of the virus, the people and Pokémon in the nearby town of Undella were infected, in which their minds and bodies were altered, causing most of them to give into their basic animalist urges.

However, there were those whose willpowers was stronger than the others of Undella town who fell to the power of the virus and could see what its power was capable of, which caused many humans and Pokémon to use the controlled power of the virus within them to bend others to their will, turning them into their loyal and obedient slaves, while disposing of those who stood in their way.

With the virus it seemed as though sooner or later a war would break out for global supremacy, however, one stormy night, the Legendary Pokémon of Unova, Reshiram and Zekrom appeared in a large flash of thunder and fire to cease the violence by draining the virus fueled meteor of all its power into themselves, in which neither of the Dragon duo were affected by the virus' power, and instead, the Dragon duo were able to control the virus.

With all traces of the virus stored within Reshiram and Zekrom, both Legendary Pokémon were able to then seal the virus within a mystical stone, much like the Light Stone or the Dark Stone, only it was known as the Azure Stone, as it shone a beautiful shade of blue.

But while its beauty was undeniable, the Azure Stone's power was quite dangerous if it ever fell into the wrong hands and was therefore sealed in the Abyssal Ruins, before Reshiram and Zekrom used their great power to submerge the Abyssal Ruins deep under the briny blue, and so, with the virus safely sealed away, every human and Pokémon who had been infected slowly returned to normal, with no memory of the events that had transpired, in which all events of the meteor, the virus and the Legendary Dragons of Unova sealing the Azure Stone away soon became nothing but a story, lost to the mists of time, but not forever...