Gentle Garden

Not to be confused with the Castle Garden, an anomalous replacement of the Castle Courtyard.

Gentle Garden is an anomalous level found in some personalized copies of Super Mario 64. It is described as a basic backyard area with an inaccessible house at one edge of the level. The level's most commonly reported entrance requires the player to obtain all Power Stars in their copy and enter the Mirror Room and go behind the mirror, where the room containing the painting leading to Gentle Garden will reside, though other means of entry have been reported. Gentle Garden reportedly contains a new ending.

Description
Gentle Garden is a large backyard area next to a house that cannot be entered due to the door not being interactable. The level consistently uses the unused Dancing Flowers effect. If Gentle Garden manifests with a new ending, no enemies or other Power Stars will appear.

If Gentle Garden contains a new ending, it can reportedly contain a large star in the center of the level similar to the one seen at the end of Bowser in the Sky, potentially being the Eternal Star, that triggers a new and unique ending. This ending can reportedly unlock Luigi as a playable character, though this is inconsistent.

However, if Gentle Garden does not contain a new ending, it can reportedly contain Goombas as enemies, and can contain Power Stars. Some commonly reported Power Stars are reaching the top of a large flower, finding a hidden way into the house, or simply breaking a ! box containing a Power Star. There are consistently never enough Power Stars to make Gentle Garden a full course.

Trivia

 * The most common painting of Gentle Garden contains the source image for the Metal Mario texture, leading some to believe this level is a case of Dynamic Level Arrangement based off of this image.