Shiny Nihilego

You stumble upon an ultra wormhole, but you remember your friend saying never to go into one, but you were so curious and just had to go inside. After you went inside the wormhole, you made it into a place called the ultra space. Looking around, you see a weird jellyfish like pokemon. You walk up to the mysterious pokemon. At first, the pokemon said nothing, but then the mysterious pokemon eventually spoke "Nihilego...?" ("Who are you, and why are you in my territory?")