On Earth (In the Unova region)
The Unova region was very peaceful with all the different types of pokemon running around. But something strange was going on. Arceus was there watching a dragon-type pokemon, destroying Icirrus City. But this was no ordinary dragon-type pokemon, it was the dragon trio, but they were whole again which was called "The Original Dragon". Arceus just watched as this once beautiful city, getting turned into rubble. Arceus wasn't worried about the humans getting hurt, he was more worried about his pokemon.
The Original Dragon just kept going and going. Not even the combine powers of "The Weather Trio (Rayquaza, Groudon, Kyogre)" and "The Creation Trio (Dialga, Palkia, and Giratina)" couldn't even stop him. Arceus just watched has his fellow pokemon were being killed by this monster. Finally after a few moments, Arceus came to save his pokemon.
"ENOUGH, YOU HAVE CAUSED TO MUCH DAMAGED AS IT IS AND YOUR HURTING MY POKEMON!!!!!" yelled Arceus. "I WILL GIVE YOU ONE CHANCE, STAND DOWN OR DIE!!!". The Original Dragon just growled at him and tried to hit, but Arceus dodged it and incased him in a orb.
http://traditionellkinesiskmedicin.se.test.levonline.com/wp-content/uploads/2011/04/Yin-Yang.png
"I am sorry, but it was for your own good" said Arceus as he was staring at the orb. "You six, I want you to clean up this mess that he caused. I will be back soon" and with that, Arceus vanished and went to his dimension to look for something.
"Now will shall I take you" thought Arceus while looking through different dimensions. "Maybe I could take him to that man. What was his name again, oh yeah, "The Author". He didn't like that plan until he saw the sun rise in one of the dimensions. "I know, I will take him to this dimension where harmony is throughout the entire world". As he said that he went into the portal with the orb.
"I can't wait to see my old friend" thought Arceus.
Early Morning in Equestria (Year 1000)
Princess Celestia was sitting down on her throne looking over some papers. "Oh, Luna how I miss you" thought Celestia. After a few moments the throne room began to shake until a being had appeared right in front of Celestia.
http://pre11.deviantart.net/a3c2/th/pre/i/2013/098/a/d/493_arceus_by_pklucario-d60w82b.png
"Hello old friend" said the being. "Arceus it's been a long time since we first met" said Celestia while smiling. Celestia then noticed the orb that was floating around Arceus. "What's that" asked Celestia as she began to walk over to Arceus.
Arceus didn't say anything until she was a few inches away from him. "This orb contains a very powerful dragon-type pokemon in my world. We call him the original dragon because he still has no name, but the reason why I came back to this world was to see my old friend and to ask you could you take him into to your world" said Arceus while doing something to the orb.
Before Celestia could speak, there was a bright light coming from the orb and when she opened her eyes, there were 5 orbs now. "Why is there 5 orbs now instead of one" asked Celestia while staring at the orbs.
Arceus held up the first orb. "This is the orb of Truth or Light stone which holds Reshiram. So I will place him where fire is most dominant" said Arceus while sending the orb away.
http://static7.depositphotos.com/1007989/773/i/950/depositphotos_7734544-3D-Illustration-of-a-White-Orb.jpg
Arceus held up the second orb. "This is the orb of Ideals or Dark stone which holds Zekrom. So I will place him where electricity is most dominant" said Arceus while sending the orb away.
http://orig04.deviantart.net/01bc/f/2011/133/1/7/black_orb_by_ekliptikz-d4n4ep.jpg
Arceus held up the three last orbs. "These three orbs are special because they have no purpose. They are what you call empty, which means Kyurem and his two transformations, White Kyurem and Black Kyurem, are probably the most powerful out of Zekrom and Reshiram" said Arceus while letting the orbs circle him.
http://www.penny-picker.com/blog/wp-content/uploads/2009/07/profits.jpg
http://orig04.deviantart.net/01bc/f/2011/133/1/7/black_orb_by_ekliptikz-d4n4ep.jpg
http://static7.depositphotos.com/1007989/773/i/950/depositphotos_7734544-3D-Illustration-of-a-White-Orb.jpg
Celestia was waiting for him to send them away, but he didn't. "How come your sending these orbs off somewhere" said Celestia who was staring at Arceus.
"Reason why I didn't send this one off is because I need you to keep a close eye on Kyurem. Reason why is because if he uses both White Kyurem and Black Kyurem, both Reshiram and Zekrom will be reborn from their orbs and try to find Kyurem. That is why" Areceus said while giving Celestia Kyurem's orbs.
"My time is up old friend, I must return to my own world to clean up the destruction" Arceus said while opening his portal. "Also one more thing. Kyurem's orb will hatch as soon as I leave so be prepared". With that Arceus was gone.
Celestia knew one thing and one thing only, Arceus was right. The orb was going to hatch as soon as he left. Celestia let go of the orb and when she did, the orb hatched into a snake-like creature.
http://pre03.deviantart.net/63cf/th/pre/i/2014/340/1/f/primal_kyurem_by_rey_menn-d88whpx.png
Celestia didn't know what to do but get into her battle stance. The snake-like creature woke up to see it was in a strange new place and it also saw the two other orbs and absorb them. He then looked at Celestia who was charging up her horn when she became cold. She looked down to see that her entire body was frozen.
Kyurem just looked at her and said " Stay away from me", and with that he flew out the window never to be seen again. The royal gurads came in to see their princess frozen. They began to thaw her out until her entire body was free from the ice.
"Are you alright Princess Celestia" asked one of the guards. "Do not worry my little ponies, I am alright. I was just trying a ice spell when it back fired" said Celestia who was blushing. She knew she couldn't tell the guards about Kyurem so she kept him a secret.
Meanwhile inside of a mountain. Kyurem had to hide from these residents so he wouldn't be hunted down. So he laid there until a bunch of blue birds came into the cave to see Kyurem.
https://thekossfactor.files.wordpress.com/2014/12/ice_phoenix_by_icestorm8-d5a55ph.jpg?w=662
"Hello, my name is Kyurem. What are you" asked Kyurem who was curious. The birds told him that they were a rare species of phoenixes. Instead of fire, they were ice.
"Would you like to keep me company in this cave" asked Kyurem who had no idea where he is. The birds said of course they would stay with him. Kyurem was smiling at the thought that he wouldn't be lonely forever.
