World 9-4 (New Super Mario Bros. Wii)

World 9-4 is the fourth level of World 9 in New Super Mario Bros. Wii. This level involves a desert landscape, which has many pipes and auto-scrolls. Most of its enemies are Fire Piranha Plants and Bob-ombs. Its main power-up is an Ice Flower, which is required to get the last Star Coin.

Layout
This level is an auto-scrolling level that takes place in a desert containing many pipes. At the beginning, Mario must progress through various pipes while Fire Piranha Plants and Bob-ombs attempt to stop him. Towards the middle of the level, Mario will encounter platforms sensitive to weight. If two entities or more are on the platform, it will start to sink. At the end, Mario finds a pipe that leads him to the Flagpole.

Star Coins

 * Star Coin 1: Towards the beginning of the level, on a pipe.
 * Star Coin 2: Hanging under a pipe, in a corner. To obtain it, Mario must thrown an enemy or a frozen enemy at it. It can also be reached with a Propeller Mushroom.
 * Star Coin 3: This Star Coin is notoriously difficult. To reach it requires an Ice Flower. At the end of the level, there will be a horizontal red pipe and a green pipe, the latter having a Piranha Plant coming out of it. The player must freeze the Piranha Plant and jump on it to go through the red pipe. The Star Coin will be directly above.

Enemies

 * Bob-ombs
 * Fire Piranha Plants
 * Cannons