Castle Grounds (Ending)

DS Castle Grounds is an area in B3313.

Description
True to its name, unused is a seemingly unused location accessible only through use of external programs like Star Display. It appears to be an extremely buggy version of both the vanilla game's Castle Grounds and Lobby connected together, with all objects like trees, doors, cannons, and water missing. The camera is very finnicky, especially inside the castle, and there is no way to exit the area once entered besides warping out. There is no music or ambiance playing in this area.

Interestingly, it is not exactly a 1:1 recreation of the vanilla game, implying that this isn't just some leftover version of the vanilla Castle. There are strange, black spots littered all over the castle grounds section, presumably a leftover from the tree objects as their locations line up, and there is also a large hole on the right side of the castle, possibly added to match the strange hole in the file select screen illustration of the castle in Super Mario 64 DS, which had been previously connected to several "Playable Waluigi" hoaxes and rumors. The Jolly Roger Bay Room is also entirely missing, with the location where the door would normally be completely replaced with solid wall. The Peach's Secret Slide room also has a window with an abnormally long path behind it, although due to solid collision it cannot be entered.

Purpose
It is possible that this area served as an early version of the Vanilla Lobby, Vanilla Castle Grounds, or perhaps even a combination of both. It may also have served as a template for some other Castle Grounds/Lobby variation before being scrapped. Its remaining presence in the files suggests that it may return in a future version in some fashion.

As it turns out, unused is actually part of an incomplete ending sequence meant for the game. Also referred to as the "Negative World", the player was sent here after achieving the good ending, where they would spawn out of the hole on the side of the castle. Entering a hole in the ground would take you to another copy of the Vanilla Castle Grounds, which would lead to the lobby room with Peach and Toads waiting for him.