Shiverburn Galaxy Trees

If you look up and to the right in a level called "Shiverburn Galaxy" in the game "Super Mario Galaxy 2" you will see 3 strange figures. They are never mentioned in the game and always follow you in the level.

SMG2 Beta Theory
Some think that Shiverburn Galaxy was meant to be an unsettling level like "Ghostly Galaxy" in Galaxy 1. It should be noted that the file name for the sky of this level is called "Beyond Hell Valley" with the figures being called "Hell Valley Sky Trees". It is also rumored that Hell Valley was Shiverburns Beta name, and since the assets tied to the level were probably made early in the games development they would have similar names to the beta name, not the finalized name.

Scrapped Level Theory
It is also belived that Hell Valley was a level that was scrapped for unknown reasons and replaced with Shiverburn. Shiverburn merely reuses its assets.