"The mythologies of the trio are implied to be connected, despite having no true relation. The origins of Zekrom and Reshiram are told in legends, as they were once a single powerful Dragon Pokémon used by twin heroes in order to create the Unova region. But the brothers each sought something different in life—truth for the older brother and ideals for the younger—and they began to argue, then fight, over whose side was right. The single dragon, in response, split into two Pokémon: Reshiram, who sided with the older twin, and Zekrom, who sided with the younger twin.
The two dragons were equally matched as they battled and neither conquered the other. As a result, the brothers set aside their differences and equally declared that there was no right side, either. But the sons of the heroes resumed the fight, and Reshiram and Zekrom destroyed the region with their fire and lightning powers. They subsequently disappeared afterward.
The third dragon came down to the world from an icy meteor and crashed into a place called Giant Chasm. The fact that Star Pieces, Comet Shards and extraterrestrial Pokémon can be found in the Giant Chasm strongly support this theory. An old legend in Lacunosa Town describing Kyurem claims that it would take people and Pokémon away from the town and eat them; this is why the town is now surrounded by a giant wall, and why none of its residents set foot outside their homes after dark.
When a person appears who is searching deeply for the truth, Reshiram will appear. At first, Reshiram will battle with that person as a test of their strength and heart. And if it decides that person is a hero, it will pass on the wisdom it has accumulated over thousands of years and then bare it fangs against the hero's enemies. From that point on, Reshiram will treat the hero with kindness, as a parent would treat a child. But although the person called the hero will be able to attain great riches and power, the goodness in their heart will be lost, and the country built by the hero will be consumed in flames. Then, Reshiram will depart.
Interesting, the histories of our region are. Excited, yes. But also melancholy. People do not deserve Pokemon. They deserve more than us. Our species are cruel, ambitious, undisciplined and lazy. I will be the one to finish them all. People and Pokemon away from each other, that is my goal. Reshiram, a dragon of truth. Now this inspires me.
What if? What if I could be the hero told in the lore? This would be great, an advantage for me as me and my father's dreams shall turn into a reality." said N to himself, reading a book inside a library. He sat furthest from the crowd, making sure nothing and no one will be able to see him. He gave a chuckle while slowly closing the book.
"When the hero turns darkness into light and the hero's heart becomes one with the Pokémon, Zekrom shall descend and lend the hero his power." he continued his words slowly.
By accident, the book he was holding as he sought to return it to its proper shelf fell. By coincidence, it turned to a page that took his interest.
"What's this?" he asked, slowing picking the book up.
"
The Swords of Justice have challenged humans according the legend in order to protect other Pokémon from losing their homes to human expansion. According to Legend, three Swords of Justice distrust humans because of the war that endangered the Pokémon living in Unova.
The reason is because of war between two human factions, which resulted in a forest fire in the Moor of Icirrus. The lives of many wild Pokémon that lived there were endangered because of it. Ensnared by the smoke, they could not escape and their demise seemed certain, until three figures appeared. Terrakion shaped the earth and created passage by which to escape, Virizion used its speed to shield the Pokémon from sparks and embers, while their leader, Cobalion, ushered Pokémon to safety.
Despite their efforts, the forest eventually burned to the ground. However, amongst the ashes, the three came across a lone Pokémon known as Keldeo who was separated from its parents. The trio adopted Keldeo into their group and taught it the knowledge and moves necessary in order to survive. Over time, Keldeo began to surpass its teachers before leaving the forest, though it is unknown why it left.
The trio proceeded to fight back the armies, overwhelming them with their combined might. Legends of them continue to be told today, and it has been said that if human conflict ever again threatened to safety of Pokémon, that they would return to quell the fighting and preserve a climate of peace."
He stopped for a moment then said, "Huh. Interesting." and there he continued to place back the book to the shelf.
Tao, so that's what you call it. I wonder if Team Rocket will gather it, or maybe not. Well, that depends whether I'm still alive or not. All I could do is to hope someone has heard about me. For now, I lay lifeless in the ocean, but there can be possibilities for me to be revived. From there on out, a new dream was forged in Natural Harmonia Gropious's mind, to be the hero of a long forgotten tale.