World 1-6 (New Super Mario Bros. Wii)
World 1-6 is the seventh overall level of World 1 in New Super Mario Bros. Wii. It is a grassland world composed of rolling green hills moving faster than those encountered previously. It is unlocked by completing World 1-4. Completing either this stage or World 1-5 will unlock World 1-. The Ground Theme plays throughout the main sections of the level.
The level starts with three rolling hills with Koopa Troopas and Paratroopas on them, followed by a larger platform. The center Brick Block on this platform contains a Beanstalk, which takes the player to a bonus area containing a Roulette Block. The next section has a pair of floating platforms guarded by Paratroopas and a Piranha Plant in a pipe below. This is followed by another rolling hill with a pair of pipes containing Piranha Plants and a larger platform on which the midway point sits.
There is a hidden Warp Pipe located below and to the left of the midway point. To access the pipe, the player must drop onto the next rolling hill and back-track with a jump into the hidden area. The Warp Pipe sends the player to an underground area with a very fast rolling rock hill. Beside the entrance pipe are two more pipes that spawn Goombas onto the platform. The exit pipe is located to the left of the entrance pipe.
Back on the surface, the next rolling hill also has a Goomba-spawning pipe above it. Beyond the pipe is a Brick Block that yields a P Switch when hit. The P Switch exposes small blue coins. At the lower end of this same rolling hill there is another Brick Block. This block has a 1-Up Mushroom inside. After the next platform with a Koopa Troopa, Mario must jump over three larger rolling hills to reach the flagpole.