Elvis Masada's Place is an area accessible from the purple portal in Mushroom World.
Features
The most notable feature in this area is, of course, Elvis Masada himself. To find him, simply go through the door on the left from the portal entrance. Interacting with him normally will prompt him to play a pleasant melody on the piano. If you equip the Trombone effect and interact with him, an event will occur where Urotsuki and Elvis play a duet. If you equip the Chainsaw effect and interact with him, he'll play a collection of random notes out of fright. When you interact with his cat, it twitches.
If you take the door at the top of the room with the portal, you'll go into an image gallery of sorts, which eventually leads to a room with a large tank of water with the Bubble Man Hitogata suspended in it, which leads to a dead end in another world. If you take the door on the left wall in Elvis's room, you'll end up in another room with four chairs. Going down from here will take you to a room with a snake-like creature. (Beware: in the previous versions, this creature was a static object, but now it screams loudly if you interact with it). Going right from here takes you to a room with a portal to the UFO landing area between the Apartments and the Pastel Blue House.
Going left will take you to Valentine Land. Going up will take you to a room with a mirror and a ghost. If you use the Chainsaw effect on the mirror, there is a chance that the mirror will shatter and that Urotsuki will be transported to another room. You can also get to this room by bothering the ghost repeatedly. If you break the mirror in that room, she'll be teleported back to the room with the ghost, but the ghost will be absent.
The soundtrack for this area is 7-9(Main Area), piano1 and piano2 (When you interact with Elvis Masada) and trom-piano (Trombone Duet).