Enter the door near the checkpoint flag. This will take you to a room with moving green blocks and a coin roulette box. Wait along the right side of the room and eventually the moving green blocks will leave a gap in the right wall. Quickly jump through this gap and go through the door on the other side. This will take you to the secret exit flagpole.
This secret exit leads to the world 1 warp cannon which will take you to the mushroom world.
Go in the room where you get the star coin with the moving platforms.You'll see some platforms that never move(you need shell Mario for this) break the blocks, and go through the opening.
through the blue door after hitting the p
the pig house
To get to the cannons, you need to find the secret exits in 1-3, 2-6, the Ghost House in World 3, the small castle in World 4, the Ghost House in World 5, and 6-6.
It takes speed after pressing sertin switches.
Go on the ghost house and go up a stem and walk into a door
To get to World 4, you have to go to World 2 and do the final boss of the world as Mini Mario. Then you can proceed to World 4. There are two ways to get to World 7. One way is by entering the ghost house in World 4 as Mini Mario and take the secret exit. This will access the cannon to World 7. Another way is by doing the final boss in World 5 as Mini Mario. Then you can proceed to World 7.
you find Yoshi first in the level simply to the right of where you spawn he introduces himself ... asks for help in finding his bros.....from then on he will be scattered amidst most levels but will always be found in the secret level above the ghost house in the third world.
Go in the door at the bottom, right and hit the invisible block when the hands point to the left. Jump up right next to the door you came through
you have to go through the first door and when it comes up with the alarm and all the boxes come down go on top of one of the boxes and let it take you up to the top.....
you have to be shell mario. try getting it from a red mushroom house or red flying block.
Mushroom house, life house and star house
You do a favor for Merlee
To unlock world 7 on New Super Mario Bros. DS, you first must find a mini mushroom, or get one from a toad house. Then, you go to the world 6 castle (boss tower), get to the boss, defeat the boss, still being Mini Mario, then the sign will switch to world 7, you will go through the tiny hole, and you unlock world 7.