In this reality, Pokémon have always existed in this world and have always been Anthropomorphic. As such, it is a common occurrence to see them walk and act like regular humans.

Now, back to our story.

One way or the other, you had managed to snag a position as an officiant inside the Temple of Origin. This sacred space was dedicated to the reverence and worship of the Original One, whom hadn't made an appearance in countless millennia. However, a text on your Arc Phone hinted that his return was near...

One day, while preparing to close the temple for the night, a brilliant and radiant light suddenly engulfed the surroundings, so powerful and pure that it bathed the entire temple in its glow. And then, as quickly as it had come, the light vanished. In its place, the Original One stood before you, in all his flawless splendor.

"Greetings to thee, young one." Came the deep yet benevolent voice of Arceus, resonating within your mind through telepathy, his tone gracious and commanding all at once.