Wing Mario Over the Rainbow

Wing Mario Over the Rainbow, known as Over the Rainbows in Super Mario 64 DS, is a special stage accessed in the Third Floor of Princess Peach's Castle in Super Mario 64. It is a level consisting of various clouds and rainbows, similarly to Rainbow Ride. The Wing Cap is required to traverse the level due to the large spaces between the clouds. There is only 1 star in this level, which is obtained by collecting 8 red coins.

Blargg
Main article: Blargg

Blarggs are unused enemies found in Super Mario 64. They are found in the files of Lethal Lava Land and Bowser in the Fire Sea, as well as Wing Mario Over the Rainbow, oddly. It has been reported that in some personalized copies, the Blarggs jump up out of the clouds. It is currently unknown why Blarggs, considered a lava enemy, appear in Wing Mario Over the Rainbow.

Walking On Rainbows
In some copies, there is a rainbow path leading to a cloud with a star. This is notable due to all rainbows in the level being purely cosmetic, and do not have collision. Another version of this star has been reported to only be accessible by using the Wing Cap to fly to the cloud.

Wing Mario Over the Starry Sky
Wing Mario Over the Starry Sky is an anomalous form of Wing Mario Over the Rainbow found in some personalized copies of Super Mario 64. It is accessed via the Internal Clock anomaly during night-time. The clouds are usually replaced with star platforms, the skybox becomes a night-time skybox, and there are several towers from Tower of the Wing Cap around the level. There are reportedly several Goombas on the towers. The objective of the level remains the same, being to collect 8 red coins.

Potential Previous Level
Wing Mario Over the Rainbow contains the actor group with Bullies and Blarggs, which appear in the lava levels of Super Mario 64. This has resulted in the belief that Wing Mario Over the Rainbow was originally a lava or fire level, potentially being a cap switch course for the anomalous Fire Flower power-up or one of the courses from when Super Mario 64 originally had 32 courses. However, due to Wing Mario Over the Rainbow being considered a "cold" level, it could originally have been an ice level, potentially Chroma Tundra or a similar level. The presence of the cold setting and lava-related enemies could imply the level being a combination of fire and ice themes, possibly inspiring Freezeflame Galaxy later on in the series.

Temperature Oddity
Strangely, Wing Mario Over the Rainbow is considered a "cold" level, similarly to Cool, Cool Mountain and Snowman's Land. It is currently believed this is potentially a remnant of an original version of this level, or, similarly to the actor group oddity, a remnant of an entirely removed level replaced with Wing Mario Over the Rainbow.

Name Change
Some people have reported that Wing Mario Over the Rainbow's name can be changed to Over the Rainbows, which is the level's name in Super Mario 64 DS. This supports the theory that Super Mario 64 DS is based off of an earlier build of Super Mario 64, as Over the Rainbows may have been Wing Mario Over the Rainbow's original name.

Climbing Oddity
Despite being unable to in standard copies of Super Mario 64, some vines hanging off of specific clouds in the level are able to be climbed by the player. It is currently unknown why this oddity exists, though the vines potentially could have been reused from a previous level that would have used them.