New Super Mario Bros. Tips & Tricks

Go to Toad Town dojo west and get a mushroom. Throw it at Luigi and he will become very big. Also if use on yourself, you will get bigger than Luigi and so on.

i'm not sure if this cheat works,in the mini-castle from world 1, at the place where you get the second star, you can see a little gap that dosen't get squished in the upper-right corner. go in there and hit the invisible 1-up blocks that leads you into the wrap pipe that leads you to world 5 . Sorry for you if it dosen't work because i really think it works for yours because it did on mine.

Go through the green pipe and it shoud be the first one you see it will take you under ground. Keep going until there is a gap, then jump onto the next platform and the next one again and the next one again. Go past the blue bats (you can kill them if you want) go past the pipes (and be careful killing flowers come out every now and again). Keep going on to the next platform, keep going go past the blue bats again (you can kill them if you want), keep going onto the next platform and the next one under all the blue blocks. Then on the ceiling above the ice there is a pipe. Go up the pipe and be careful a killing flower comes out. Keep going when you get up and jump on the red flag then you're done.

In the level about 1/3 through there should be a flying Koopa, Kill the Koopa and jump on the ? box. You should get a mini mushroom, now get it. you will be micro mario! now go back to the mini tunnel and go through it. And you will be in a secret room.

If you have fire power when you see Bowser, shoot him with fire power 3 times.