How do you get to world four? - Nintendo New Super Mario Bros. for DS

You will have to contact the company that made the game for that.

Here try this one.
WORLD 5-4
You can find the Star Coin at this stage of this world. Look at the photo.

• At this stage, you should pick up a Bob-Bomb and then quickly jump to the ledge.
• Drop the Bob-Bomb in the white blocks to get rid of some of it and then drop down to the raft.
• The Star Coin should now appear.
  
• pick it up and then enter the pipe above.

WORLD 6-5
You can find the last Star Coin in a Secret Area with a Secret Goal.

• Look for the four item box in the water. like in this photo.
• You will need to jump or swim in the middle of the four boxes to reveal a hidden box that contains a beanstalk.
• Climb up the beanstalk to reach the other area.
• In the Other Area, you will need to pick up a propeller block.
• Get the coins and the go right to the second floating box.
• From this box, you will need to spin to reach the Star Coin and the Secret Goal.

WORLD 7-6

• After you came across some small parabeetles,then you should come to a line of big parabeetles.like in this photo.
  
• Look down low and you should see the Star Coin poking above the low clouds.
• Ride down to the Star Coin using the Last Big Parabeetle.
• Then wait for the small parabeetles. and then Jump down to get the coin and step on the small parabeetle. (Be careful in this part, you should jump at the right timing so that you wont fall off the clouds.)

WORLD 8-7

• You should ride the next platform down as you jump a geyser like in the photo.
• Stay near the front of the the platform so that you can grab the Star Coin before hitting the geyser.
• After getting the Star Coin, quickly jump to the platform above you to avoid the geyser.

Thats it. Goodluck, Hope my solution helped. Please give some feedback regarding my solution.

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how to beat the world four ghost house with a red flag

OF WAT GAME

When trying to beat boses on world 3 and 6 you have to beat the boss with mini mario.

maybe it's not for gh world tour

You need the microphone, two guitars, and the drums to play with four players.

Turn them all on, and go into the game. It will recognize all four controllers, and let you play with four people.

you need to beat the castle in level six while being mini- mario and it will open up level 7.

The mushroom houses at the start of each world (the point with an arrow at the start) differ determining on the time you get on a stage. If you get x44, x55, x66 on the timer, a Green Mushroom house appears, which is a 1up minigame.
BONUS TIP: In World 7-5, throw a Koopa shell in-between the two Bullet Bill cannons to get an extra life every four seconds

:)