Then Bowser becomes the king of Mushroom Kingdom, turning every living thing into his minions, especially the humans, who will be turned into koopas (like Bowser).
What if Isle Delfino was located in the Gulf of Mexico?
Darkness will engulf the Earth in the night, only to have the streetlights show the way; also, that'd be pretty stupid if the moon is defective against objects that are millions of miles away.