Find the 'L' he mentions right behind you where you usually spawn when starting the game. After obtaining 60 stars and defeating Bowser in world 6, Luigi sends you a letter saying he'll switch off with you at any time (English: Luigi has been unlocked). He's hard to slow down, causing him to sometimes slip off cliffs. He runs faster, jumps higher, but harder to control. This time, after unlocking 30 stars, he's playable but only in certain galaxies. Remember the underdog Mario bro, Luigi? He makes an appearance a second time in the Super Mario Galaxy series.

Keep with the koopa until the end(99 lives) and you'll be stocked up and ready for adventure! Keep jumping on the shell though, for every jump after that will get you ANOTHER 1-Up. After 7 consecutive jumps, you'll get a 1-up for your work. Never press the opposite direction you're jumping in that'll cause you to fall off 90% of the time. Once jumped on once, KEEP JUMPING ON IT AND MOVE A BIT WITH IT. You'll have to long jump behind one to jump on it's back. Once launched to the circular planet with huge koopa troopas, be ready. Head on into the level like you normally would until the first Launch star.

If you have gotten to or beaten World 4, go to it. This next trick will have you swimming in 1-ups (possibly drowning). We also know about 1-Ups and how no matter what, when you restart your game, you get stranded back to 5 lives. Used this to get 3minute Bowser Jr Megahammer run. The goal is to get Mario to duck, NOT dismount, then quickly flutter again. Press A again to flutter jump again in MID AIR. As Yoshi flutters, TAP(yes tap, NOT HOLDING) Z while still holding A and then release A quickly. Next, jump and hold A to get him to start his flutter. If using the correct button pressing and timing, Yoshi can use infinite fluttering. Did you know he has a glitch? Yoshi has the ability to flutter. We all know of Yoshi's special appearance in this game. Here I will be telling you some amazing stuff i found in this amazing game. I've seen some of the cheats on this list and they're either barely explained or not even right. This gives Mario time to go around it or escape. While Mario is on a planet where an obstacle (Like an Electric Fence or a Chainchomp) can get in you way and hit you off stage, you can hav P2 press and hold A on that obstacle to stop it from moving and hitting Mario. When Mario is fighting an enemy that can only be defeated by deflecting it's attack at it, you can press A on the attack (Like if it shoots coconuts at you) and the P2 Luma will bring it to Mario where as he can use the spin to deflect it at the enemy.

While Mario is swimming underwater, you can press A on any air bubbles in sight to refill Mario's air gauge. The P2 Luma will retrieve the item and give it to Mario! When there is a faraway item (Like a 1 Up Mushroom) that you do not want to risk getting, have Player 2 press A on the item. When Mario gets hit by riding on a Yoshi, press and hold A on Yoshi to stop him from running away and let Mario jump back on him. Then, shake your Wii Remote and star bits will come out of the Luma. Attach yourself to a Luma by pressing and holding A.

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