Pokey Oasis

Pokey Oasis is a supposed level that can be found in Super Mario 64. It is described as a large lake inside a desert with several Pokeys. There are 8 red coins scattered throughout the level that when collected, present the player with a star. There is also a star at the bottom of the lake, though it is surprisingly deep. The sand is light brown, and there are palm trees and the unused Cactus object dotted throughout.

Other Manifestations
Pokey Oasis is a special level in that, if it manifests in Super Mario 64, it can be stop n' swopped with certain other Nintendo 64 games to be unlocked as a playable area, as well as spread the Personalization A.I. to the game it is swapped to. Below is a list of manifestations of Pokey Oasis in games it is stop n' swopped to.

Mario Kart 64
If a Super Mario 64 copy with Pokey Oasis is Stop N' Swopped with Mario Kart 64, Pokey Oasis can be unlocked as a playable course, though with a different layout, replacing a random track in the Star Cup (Note: Wario Stadium has not been replaced in any reports). It shares it's music with Kalamari Desert, gains high walls, and an Angry Sun enemy, similarly to Mario Kart DS' Desert Hills track

Mario Party
If a Super Mario 64 copy with Pokey Oasis is Stop N' swopped with Mario Party, Pokey Oasis can be unlocked as a playable board. It is described as a simpler board, implying it was created earlier on in development of Mario Party. It is a square board with spaces around the edge, as well as 4 paths leading into and through the center of the map. The resulting 4 empty spaces are filled with several Pokeys, lake, palm trees and cactuses, as well as dunes.