Super Mario Galaxy 2 cheats

Unlockables: Luigi he's unlocked at some point during the 3rd world, also once you beat the game you can change to him a free will on starship mario.

Unlockable ghosts: Beat atleast 1 galaxy's gold star *any gold star* with luigi to unlock a time trial ghost for that galaxy.

Green Stars: collect all 120 gold stars then beat bowser again to unlock the green stars.

Grand Master galaxy: collect all 240 stars to unlock the grand finale galaxy.

Grand Master galaxy the perfect run: give the banker toad 9999 star bits to unlock and make sure you have the cosmic coin in this level as well to unlock this star.

Quick starbits: Do the molten monster galaxy roll down lane or something like that star *dont remember* this is a fast way to get star bits quick.