Blue Grass Galaxy
Blue Grass Galaxy is a name for a possible scrapped beta development level of Super Mario Galaxy 2. Many websites such as IGN and Channel 11 Australia have said that this Unknown Galaxy was meant for inclusion in the game, but later scrapped with many other Galaxy sketches. It may have been possible that a scrapped level from Super Mario Galaxy had made its comeback in the Beta testing of Galaxy 2, but otherwise a slim possibility. It is unknown whether this sketch existed at one time or not, but many people have debated its existence since the release of the game on May 23rd.
Origins
Super Mario Galaxy OST
The release of the official Super Mario Galaxy 2 Soundtrack by Nintendo saw the coming of the Blue Grass Galaxy rumors by a forum entry in Channel 11 Australia's The Forum Section: Gaming. Track 19, entitled "Puzzle Plank Blue Grass" caught the attention of a blogger saying "Why Track 19 Puzzle Plank Blue Grass?". Another person replied, "there must be some kind of Galaxy that was scrapped but had this music.". It was then that the rumors of Blue Grass went into media.
E3 2009 Trailer Review
Proof of this galaxy may exist in the E3 2009 Announcement Trailer of Super Mario Galaxy 2. A screenshot showing an unknown platform with Mario jumping on three Twirlips in a row also shows a planet in which resembles none of any of the planets and galaxies in the final release of Galaxy 2.
Possible Soundtrack
"Puzzle Plank Blue Grass"
As pointed out before, track 19 of the Super Mario Galaxy 2 Original Soundtrack was called "Puzzle Plank Blue Grass". It could have been the music for Blue Grass also, and not just Puzzle Plank.
"Galaxy Song 25"
Although the name of Track 19 clearly states Blue Grass in its name, many other people doubt otherwise. Track 9, "Galaxy Song 25" never played in the game at all in the final release. It could have been the theme for Blue Grass during Beta testing, but the fact that the song was originally recorded for the Fleet Glide Galaxy limits the possibility if it once being so.
"Space Storm Galaxy"
Inital Theory
To most believers, the music for the Space Storm Galaxy seems to be the one that fits the bill. The Space Storm Galaxy itself was a late addition to Super Mario Galaxy 2, and the music that plays in the galaxy also plays in the Battle Belt Galaxy. Alot of people can note that the music for Fleet Glide was supposed to be for Battle Belt too. There is evidence to support this.
Soundtrack Replacement Theory
Many people believe that Track 12, "Space Storm Galaxy" was originally the Blue Grass Galaxy music and when Battle Belt Galaxy's music was recorded, it was originally Track 18, "Fleet Glide Galaxy". When Space Storm Galaxy made its debut in the game, they scrapped Blue Grass and moved its music to Space Storm Galaxy. Battle Belt Galaxy's Music then Replaced Fleet Glide's "Galaxy Song 25" and Track 9 never made it into the final release of the game. When Battle Belt's music replaced Fleet Glide's, Space Storm's music became Battle Belt's aswell, making up the soundtrack in its present final release order.
Planets
Unknown Planet
Only one thing is known about this galaxy and the fact that in the E3 2009 Trailer of SMG2, Mario is seen jumping on three Twirlips in a row on a planet looking unalike to any one of the galaxies in Super Mario Galaxy 2.
