When you first look at this galaxy, you think it is easy, but trust me, at first it can be hard.
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Super Mario Galaxy 2: Grand Master Galaxy ~ First Star (The Ultimate Test) - Video
Freezy Flake Galaxy Star #3- Hidden Star #9
Read more from the original source:
Super Mario Galaxy 2 Wii Walkthrough Part 43 (Hidden Star) - Video
Fluffy Bulff Galaxy - Star #3 (Make sure you get the letter about the monkey, If Not you can not play this star)
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Super Mario Galaxy 2 Wii Walkthrough Part 17 - Video
Bower's Jave Lair - Star #2 (Prankster Comet)
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Super Mario Galaxy 2 Wii Walkthrough Part 53 (Prankster Comet) - Video
Fluffy Bluff Galaxy Star #1 - Hidden Star #3
Link:
Super Mario Galaxy 2 Wii Walkthrough Part 10 (Hidden Star) - Video