The Other Castle Grounds

The Other Castle Grounds is a scrapped level that would serve as a tutorial level, taking place near the Castle Grounds. It was discovered in the July 25th 2020 Leak, it is described as a large grassy plane with a few trees and a lake. It would end with a pipe that leads to the Castle Grounds.

Remnants
In the Castle Grounds, there is a lake. Notably, unlike the other parts of Castle Grounds, there is not a hill at the edge of it, contrasting with the other parts of the map. This would supposedly connect to the Other Castle Grounds, specifically in its lake. However, the Other Castle Grounds can not be accessed from there, likely due to the invisible wall.

Removal
This stage was relatively large, though it had too little in it, being a flat plane of grass with a few trees. It is possible it was removed due to it's size, and the tutorial was instead squeezed into the Castle Grounds. Due to the nature of the Other Castle Grounds, it also could have been an edited test level.

Reimplementation
Recently, romhackers have managed to insert the Other Castle Grounds back into the game, even making a pipe that leads back to the Castle Grounds. It is missing some textures, simply replaced with grass textures. Some areas of the map also don't have collision. This implies that the level was unfinished, and was potentially corrupted.