Dry, Dry Dunes

Not to be confused with Dry Bones Desert, another anomalous desert level found on Floor 2B. Dry, Dry Dunes is an anomalous desert level found in some personalized copies of Super Mario 64. It is described as a night-time desert area with several dunes sticking up from the ground with a unique sand castle sub-area. It usually appears in place of Shifting Sand Land, though can supposedly be found through other means such as a unique painting or hidden warp somewhere in Princess Peach's Castle.

Description
Dry, Dry Dunes is described as a level filled with several of the titular dunes, dividing the level into 2 main segments, being the bottom area and the area on top of the dunes, with the latter usually being particularly hard to reach and traverse. Both areas reportedly only have Pokeys as enemies. Notably, quicksand has never been reported in any part of this level.

The sub-area of Dry, Dry Dunes seems to usually manifest with one out of 2 main methods of entry. One method is by entering a sand castle somewhere in the level, most commonly on the bottom segment of the area, or ground pounding part of a dune to reveal a hole in the ground leading to the sub-area. The sub-area itself however is relatively consistent, being an underground area with several platforms leading up from a bottomless pit.

This level has reportedly had some form of compatibility with the Internal Clock anomaly, likely due to the level most commonly be reported with a night-time aesthetic. While no consistent changes have been reported except for the skybox changing, plays with copies with both Dry, Dry Dunes and the Internal Clock commonly report the 2 intersecting in some way, shape or form.

Power Stars
The most common Power Stars reported in Dry, Dry Dunes are found by knocking it out of the grip of Klepto, finding it on top of the largest dune in the level, finding 8 red coins, most commonly in the level's sub-area, and finding 5 secrets on top of the dunes. Some less commonly reported stars can be found by platforming in the sub-area to a Power Star, and finding the Power Star by ground pounding a dune containing the star, similarly to one of the 2 entrance methods to the sub-area of Dry, Dry Dunes.

Report 1
This level has been reported by the Youtuber known as First Name Last Name in one of their videos documenting Super Mario 64 anomalies. The video begins with the player running to Shifting Sand Land's entrance, which now leads to Dry, Dry Dunes, with 4 missions shown: Klepto's Stolen Star, Inside The Sand Castle, The Biggest Dune, and The Secrets Of The Dunes, which is selected. The player briefly runs around the level before entering a sand castle leading to the level's sub-area, where they run around and collect 8 red coins, occasionally falling down causing the footage to cut out before reappearing in the sub-area, before collecting the sub-area's Power Star as the video ends.