I Must Go. My Ultra Beasts Need Me.

Notes:

Nihilego's Ultra Moon Pokedex Entry: "It appeared in this world from an Ultra Wormhole. Nihilego appears to be a parasite that lives by feeding on people and Pokémon."
Litwick's White Pokedex Entry: "While shining a light and pretending to be a guide, it leeches off the life force of any who follow it."
This isn't looking good…