World 1-4 (New Super Mario Bros. Wii)

World 1-4 is the first underwater stage of New Super Mario Bros. Wii and in World 1. It introduces Cheep-Cheeps and Deep-Cheeps.

Layout
At the beginning, there are two ? Blocks, two Goombas, and a Warp Pipe leading underwater. Here, there are two Cheep-Cheeps that must be frozen so that Mario can get to the ? Block, which will get him an Ice Flower. There are many bubbles flying around that can push Mario into walls.

The next area also has Deep-Cheeps which must be frozen along with the Cheep-Cheeps. There is also another ? Block with another Ice Flower in case Mario has lost his previous one. Past here, there is a Red Ring, which will make eight Red Coins for Mario to collect. There is also a checkpoint flag.

In the next area there is a roof so Mario must freeze the Urchin and it will break the roof allowing Mario to get through. There is also a Star Coin which is guarded by a Mega Cheep-Cheep that Mario must freeze to get past. After here, there is a Star Coin guarded by two pipes that generate a current that keeps the player from getting too close. The Star Coin may be collected if the player freezes a passing Cheep Cheep and stands atop it as it floats up, fighting the current. A similar one is a short distance forward, where an Urchin must be frozen to block the current and allow the player to pass and collect the Star Coin. In the next area there is a Spiny Cheep-Cheep that will follow Mario. He must destroy that Cheep-Cheep and then get the 1-Up Mushroom at the bottom of the screen. There is also a Fire Flower and a Starman. Mario must then go through a Red Pipe. Many Cheep-Cheeps populate the next area so Mario has to use his Starman to destroy as many as possible and then go through the green Pipe. Then there is a Koopa Paratroopa that Mario can use to land on the flag at the end of the level.

Star Coins

 * Star Coin 1: Above a Cheep-Cheep, but the player needs to freeze the Cheep-Cheep with an iceball to jump on it and collect the Star Coin.
 * Star Coin 2: Between 2 Red Pipes that generate a current to keep the player away from the Star Coin. The player can stand on a frozen Cheep-Cheep to collect the Star Coin.
 * Star Coin 3: Next to a Warp Pipe that's next to a red pipe with a current, but the player has to freeze an Urchin to block the current.

Enemies

 * Goombas
 * Cheep-Cheeps
 * Urchins
 * Mega Cheep-Cheeps
 * Deep-Cheep
 * Clampies
 * Spiny Cheep-Cheeps