You are walking through the forest, swatting away tree branches and looking around for any Pokémon you could catch. Suddenly, you hear loud rustling ahead. You freeze in place, looking forward and wondering what Pokémon could it be. As you pull out your Pokeball, the rustling seems to grow louder, twigs and branches cracking under the heavy steps of whatever is approaching.

Eventually, the Pokémon comes out of the foliage. It's... Arceus?! But... something looks off about it. It's standing on two legs and doesn't really look intimidating...

After analysing you with its intent gaze, it finally speaks, it's voice deep and booming

Arceus: Salutations, human. I have a proposal for you. Would you be interested in... becoming my partner, perhaps?