The Underwhere is a location in Super Paper Mario. You arrive there first by Dimentio who kills Mario, and Mario ends up there. It is quite a desolate landscape. Once you arrive there, you see Luvbi, the daughter of Queen Jaydes, who insults you in an inunderstandable manner. As you progress through The Underwhere you'll see many people including Luigi, Shaydes, and D-Men. After meeting Queen Jaydes, and rescuing Luigi, you will be able to return to Flipside. However, your time there is not over. You will have to return as the Underwhere is the starting point of chapter 7. In 7-2, you will progress through the underwhere road to bring Luvbi back to the overthere to see her father, Grambi.