Super Mario Galaxy 2 100% Walkthrough Part 37: Big Bowser Battle

This is it! The final Grand Star to end all Grand Stars! Maybe it's the sun or something. But first will be a trek through the stage leading up to the final battle, which is probably the hardest thing since you essentially did the final battle twice before. :P Fluffy floating will begin the area, which is easy to avoid the fire balls. Then a Banzai Bill cylinder with lava where positioning is essential to not get knocked around or get trapped. Next is a pretty basic cloud section, though don't get hit or you probably won't be able to recover. After that Yoshi comes into the mix and you have to keep it all the way to the comet medal through the swing, dash and snake block section, which for the latter makes the jump transitions between the two more awkward due to a lack of a long jump. Well, unless you want to cheese it by taking damage. :P But I showed the proper way. It then leads to the final boss and all the goodies that follow it.

Super Mario Galaxy 2 Menu:
https://pkgam.tumblr.com/post/170010676210/super-mario-galaxy-2-menu

Time Stamps:
0:22 Foreboding Cutscene

-World 6-
Bowser's Gravity Generator:
1:18 Bowser's Fortified Fortress (Comet Medal finally collected at 13:53)

15:46 Final Boss!
25:33 "Ending" (C'mon, you know there's more stars... :P)
27:28 Credits
32:11 Staff Letter (https://www.youtube.com/user/MrGOOMBAGUY noted that I forgot to add this. Thanks!)

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Enjoy!