World 8-4 (New Super Mario Bros. Wii)
From the Super Mario Wiki, the Mario encyclopedia
The level begins on a platform with a Glow Block, as well as a ? Switch that causes the platform to disappear. The player then falls down a deep tunnel into the water, where a Warp Pipe leads to the next area. Three ? Blocks are found, one of which contains a power-up. The section contains Bulbers, which light up the area, as well as Stone Spikes on platforms above. A Warp Pipe appears at the end of the area, taking the player to the next section.
The next section of the level begins with a group of Jellybeams, which act as the main light source of the area. A ? Block and some Cheep Cheeps are also found. Bloopers are found trapped inside blocks, which disappear when a ? Block in between Jellybeams is pressed. A ? Block containing a Super Star is above one of the Bloopers. More Jellybeams, Bloopers, and Deep Cheeps follow, with a Warp Pipe leading to the next area. This area is vertical, containing multiple Jellybeams. Four Warp Pipes that blow currents also appear as obstacles. A Warp Pipe at the top of the area leads the player to the flagpole.
There is a secret area in the level, which can be accessed through a Warp Pipe underneath the last group of Stone Spikes in the second room. It contains several coins and a Spiny Cheep Cheep.