New Super Mario Bros. Cheats

Go to the last castle in World 6. Go to the end. When you fight Monty Cannon, duck when he shoots the Bullet Bills. When he comes out of the cannon, jump on him, jump on bullet bills if needed. Jump on him three times and Wa-La! He's dead!

in castle #6 find a Koopa and u must got fire mario to throw fire balls. throw a fire ball on a Koopa and he falls on lava. that is a Double Kill.

hard to do

First, get fireballs.Then go to any of the bosses except for Dry Bowser and the World 7 boss and world 6 boss. Just use fireballs on them. Even the last level! They should die pretty quick.

at the mario v.s. luigi level with a lot of pipes, if your opponent gets a mega mushroom, when he comes towards you and just go down that pipe that takes you to the beginning and end of the level