Pokey Oasis

Pokey Oasis is an anomalous track found in Mario Kart 64, as well as a course in Super Mario 64. It is a desert level that can appear upon Stop N' Swopping Mario Kart 64 and Super Mario 64 together, unlocking the track in both games. Pokey Oasis is usually the first anomaly noticed by players after the A.I. has successfully been transferred into the game, though other anomalies do also appear around the same time as Pokey Oasis.

Mario Kart 64
In Mario Kart 64, the track appears as a desert level with a small number of cacti and palm trees, light brown sand, a small pond in the center surrounded by grass, and several Pokeys who don't appear anywhere in the final game, hence the name. It bares many similarities to Kalimari Desert, likely due to them sharing a theme. The Angry Sun can also reportedly appear and attack the player, similar to the Desert Hills track in Mario Kart 64. The level commonly replaces a track in the Star Cup and is surrounded by tall walls.

Super Mario 64
In Super Mario 64, the level can reportedly be found in place of Shifting Sand Land or through a hidden warp in the level. It is a relatively small level, simply consisting of the central pond from the Mario Kart 64 track with several Pokeys dotted around the sand, alongside several of the palm trees from Shifting Sand Land and the unused Cactus object. The level can reportedly contain a Metal Cap to sink to the bottom of the pond, as well as a Klepto, Dry Bones or the Angry Sun on land, and Bubs or Bloobers in the water.

Missions
The most common mission is an 8 red coins star, usually with the red coins split evenly between the land and water segments. A star can also usually be found at the bottom of the lake, often when a Metal Cap is required to sink to the bottom. Klepto can also hold a star, and a Koopa the Quick race, potentially referencing the level's connection to Mario Kart 64.