As promised, the Giratina story, based off Mademoiselle Noir. This has absolutely nothing to do with the Arceus one.
In the beginning, after the Mew were almost wiped out, Arceus created the prototypes of modern humans. These creatures were somewhere in between Pokémon and human, with the powers of Pokémon but the looks of humans. Of course, some of them had wings, tails, and claws, and others had extraordinary power. Those who passed Arceus' test were reborn after they died as legendaries.
One of them was a female named Giratina. Unlike the rest of her mostly petty, selfish, and ignorant race, she had a level head and red eyes full of sadness, golden hair, and ghostly black wings. She never smiled, and was as pale as a ghost. There was a certain dark beauty to her, and most of the other females were jealous of the girl who held more knowledge in her eyes than the rest of them combined.
This of course, attracted Arceus' attention. He would often come down to visit her as a young male, and the two would talk. He would ask her about things, her life, and she would answer.
He found out that Giratina stood for balance, keeping her siblings Palkia and Dialga in check. "I tear down the corrupted, make room for new roots to grow. I am neutral." Her voice took on a sad note. "But it doesn't matter. I cannot stop my siblings, only restrict them. And they never listen."
Soon after that, Giratina became pregnant, but her children had no father. Palkia flew into a rage, believing Arceus to be the father. Palkia had always vied for the attention of Arceus, and was furious when he chose Giratina. Palkia began to turn the others against Giratina, and soon all of the others wanted to kill her.
Their desire became even worse when Giratina bore three children, each as gifted as she was. Mesprit, with her endless compassion, beauty, and bubbling spirit, Uxie, with his vast knowledge, and Azelf, with his endless courage and willpower, unlike the rest of their cowardly race.
While she slept, Palkia drugged her sister and her children, and began to burn them to death. In her last moments, Giratina finally showed her first emotion as she cried out for Arceus to save her and her children.
Arceus arrived to find his friend and love dead, and he brought her and her children back to life, her as the legendary dragon Girantina and her children as the beings of the lake.
But Giratina was bitter, very bitter over her death, and in her fury she created the first ghost Pokémon as her minions, set her children against their father, and waged a war against her former love.
When Arceus finally defeated her, he sorrowfully banished her to the Distortion World, her children to the lakes, and her ghosts to the night. He then destroyed her former race, vowing to start anew.
It is said that deep in the Distortion World, Giratina howls her misery out to the silence, gazing upon her old home and the sleeping forms of her children and love, regretting all that she has ever done.
And deep inside of the Hall of Origin, there is a mirror that shows the user whatever they desire the most, and it is always a scene of earlier, happier times of sitting beneath a tree and talking about morales and life.
Me... Double cheese pizza with extra cheese on top! I ruined it! Mademoiselle Noir is this really sad clip/advertisement on Youtube, and it's about this princess trapped in a tower, except for the fact that she doesn't smile, and it is hinted that she is dead. So along come these villagers, and she tells them something in a foreign language, and then tells them to leave her be. But since they are convinced she is the living dead, they burn her to death. The last lines are: As she waited for her prince to save her, she sang for the last time. "My name is Lady Black. As you can see, I don't smile, or laugh, or live... so leave, leave me be." And her prince never came to save her, and the villagers watch as her ashes drift away on the breeze.