Thousands of years ago...
"I am stronger than any mythical Pokemon that has ever walked this Earth! Dahara, you must bow before me! You must succumb to your new master!"
The citizens of Dahara City trembled in terror, hiding amongst the dark shadows of the town as the malevolent Pokemon hovered above them. This is exactly what they had feared. The lust and desire for gold, which had been freely given to them by Hoopa, began to take an evil and destructive turn. His motive had never been for the benefit of Dahara City, no. Hoopa was a Pokemon of pride, mischief, selfishness, darkness, evil, hatred, self-gain... He cared nothing for humans and Pokemon trainers. In fact, he laughed at how pathetic and desperate most of their actions were just for profitable gain.
"A deal cannot be broken! Citizens of Dahara, in exchange for your greediness and desire of gold which I had freely supplied to you, there comes a price to pay. You MUST bow before me! If you decide not to bow, then I WILL take your so precious life from you!"
"Stop it right there Hoopa!"
A beautiful voice, like the sweetness of pure honey echoed loudly throughout the city. The voice had authority and power, causing fear to strike deep within Hoopa's dark heart immediately.
"Arceus..." He growled deeply under his breathe, knowing instantly who the old man was that had approached him.
The yellow circled talisman that hung from the old man's neck glistened brightly within the shadowy atmosphere, almost as if it had a light of it's own. The talisman's, which each mythical Pokemon by Arceus's law at the beginning of creation had to wear at all times, were used to store their immortal powers in order so that they could transform as humans and 'hide' as normal people within the Pokemon World. Arceus had warned at the beginning of creation that this law at any cost could not be broken. Humans and trainers alike could not be at risk of being put in harms way from the godly strength that these Pokemon possessed. Walking the Earth in a human form and fulfilling their duties would keep the natural balance of nature and the World at peace.
Each mythical Pokemon had agreed on Arceus's law in order to keep the natural balance for the safety of all humans. When it had come to Hoopa's turn, he challenged his master.
"Why should we have to give up our powers for these weak, pathetic humans? I mean, look at them! They laugh in the face of death, they use Pokemon for means of wealth and selfish gain. They pollute the Earth, the sea and everything that lives within it. Have your eyes not seen yet Arceus, that your creation of humans is a complete disaster?" Hoopa's eyes glowered a beautiful hue of indigo as he glared into his master's eyes. Hoopa had been the most beautiful, the most majestic and the strongest of all of Arceus's creation. However, if Hoopa could not take the talisman and surrender to his duties amongst the human race, then Arceus would have no choice but to cast the Pokemon out for all eternity into chains of darkness.
Hoopa disregarded Arceus's stupid law. He wanted to cause chaos, and what better place to start than Dahara City! A city where the hearts of humans were filled with hatred and greediness. Oh, it wouldn't be hard to tempt them with infinite wealth so that they would bow to the name of Hoopa instead of Arceus. It angered him to his very core to see those pathetic weaklings praising and lifting up the name of Arceus but then hiding deep, dark secrets within their corrupted hearts.
Hoopa decided that he would allow them to embrace it, for these pathetic human's to see his full potential in order so that generations to come would praise the name of Hoopa and continue with stories of his powerful legacy into the future. What a incredible plan it was.
The citizens of Dahara City were filled with hope as their mysterious saviour began to approach the powerful creature. In order so that the humans could not hear his conversation, Arceus began to communicate with Hoopa using telepathy.
"You walked away from the truth."
Hoopa burst out into hysterical laughter, as if what Arceus had just spoken was the funniest joke he had ever heard. "Walked away from the truth? No. See Arceus, I simply opened my eyes to the truth. I see the vile and disgusting acts of humans while they torture innocent Pokemon for their own means. You may have every other mythical Pokemon fooled, but my eyes have been opened."
Arceus slowly took another step towards his most strongest creation. "I gave you power over every single Pokemon, over the Pokemon of the land and the Pokemon of the sea. Every single legendary and mythical Pokemon can be summoned in your name. I created you to be just under myself in power, because YOU Hoopa had the ultimate destiny to fulfil. I gave you that power freely, however I warned you that your power had to be weakened so that humans could partake in no part of this. Their safety is priority."
Anger bubbled deep within Hoopa's throat. It was obvious that the 'safety' of measly little humans mattered more to Arceus than his own powerful and magnificent mythical Pokemon whom he had created first. How dare he!
"I'm giving you one last chance Hoopa. Surrender yourself, or be cast out into chains of darkness, where your shadow will forever be bound in torment."
"ARGHHH! NOOO! I REFUSE TO SURRENDER TO HUMANS!"
Hoopa's eyes suddenly turned into a corrupted blood-red colour as he raised his 6 ringed arms in the air, calling upon lethal winds to destroy the human race and the hopeless city that they resided in.
As much as the idea of casting Hoopa out into the darkness ached the very core of his pure heart, Arceus had no choice now. He raised an exquisite yet frightening bottle into the air towards his fallen creation. "Light of confinement, come forth now!"
The citizens of Dahara gasped as the mysterious bottle began to radiate the sky with a alluring light pink colour, hurling forth powerful psychic chains that constrained Hoopa's body. He let out an enraged growl, almost causing the entire city to shake. He couldn't fight the chains... They were too strong...
"I bind the true form of Hoopa, his shadow, inside this magical bottle which has been crafted by myself using the powerful elements of nature in the heavenly realm. When the sun has risen, Hoopa must be confined within either the form of a human, or as a very small Pokemon that cannot cause any physical harm or have any powers of any sort, on the exception that he can teleport to help others. Once the sun has set, Hoopa will be forced back into this bottle as his true form to once again be tormented with his enraging anger within the chains of darkness. He will never be truly free until he finds his ultimate salvation."
Once the bottle had been secured shut, Arceus nodded towards the citizens of Dahara City. "Forever praise the name of Arceus and turn away from evil, then your city will be blessed."
Then he left.