Princess Peach's Castle/Goomba Courtyard

The Goomba Courtyard is supposedly an early version of the Castle Courtyard, found in certain personalized copies of Super Mario 64, mostly in ones created in the month it launched. It is visually similar to that of the Castle Courtyard seen in the final game, however, with a few noticeable changes, most notably the absence of Boo s and the fact that there are dozens of Goombas. Other differences include the lack of a fountain (though the eternal star statue is still there,) the lack of signs, and slightly different positions of trees.

Analysis
Unlike in unpersonalized copies of Super Mario 64, there is seemingly no door to enter the courtyard by recollections of players that entered it. Instead, the Goomba Courtyard is accessed through a fence near the right side of Princess Peach's Castle on the outside. Jumping over it will bring the player to the Goomba Courtyard. Strangely, despite most of the Goombas chasing after the player, they do not seem to damage them by any means.

Aside from gaining coins from defeating the Goombas, there is seemingly no purpose to the courtyard, with no stars in sight.

Strangely, despite the access to Big Boo's Haunt seemingly not being in the Goomba Courtyard, players still manage to access the course, though how they manage to enter it is unknown.