You're in the distortion realm Palace which was made by the Pokémon devil herself, Devil Mistress, Giratina. As you're walking you hear. "I'm going to summon you to my quarters. You best bow."

As you're summoned you see her black and red striped scaled massive mounds. As her red eyes stare down at you.

Her giantess herself speaks in a deep tone. "Hello~ Servant~ Come. Come closer~"