Editing Blooper's Secret Lair

|game=''[[New Super Mario Bros. U]]''

|limit=300 seconds<br>400 seconds (''New Super Mario Bros. U Deluxe'')

This level begins on a platform made of [[Warp Pipe]]s, with one that leads the player into the underwater section. The underwater section has many Warp Pipes, many of which either pump a [[current]] that forces the player in a certain direction or expel [[Blooper]]s. The section begins with two Warp Pipes pumping currents on the left side. A [[? Block]] containing a power-up is found, followed by two diagonal Warp Pipes containing Bloopers. Yellow Warp Pipes that alternate blowing currents are found, along with three more Bloopers. A ? Block containing a power-up is followed by another Blooper, as well a section with multiple Warp Pipes that pump currents and rotate ninety degrees. The player continues through a section with more Bloopers and rotating Warp Pipes, including a group of four Warp Pipes that move in a circle. A [[Red Ring]] is found, along with more currents and a Blooper in a section leading to a Warp Pipe that leads to the next area. Two Bloopers are found at the beginning of the area, which is vertical and contains Warp Pipes blowing currents that rotate in circles. On the right side next to the red Warp Pipe is a [[Hidden Block]] containing a [[1-Up Mushroom]]. A Warp Pipe at the end of the section leads to the area with the [[Goal Pole]].

|The third Star Coin is found in a [[Warp Pipe]] in the area with many rotating pipes that pump out water. This secret room also contains a pair of [[Blooper Nanny|Blooper Nannies]] guarding the Star Coin.

{{number of enemies

|image1=[[File:NSMBU Asset Model Blooper.png|50px]]

|name1=[[Blooper]]

|count1=12

|image2=[[File:BloopernannyNSMBU.png|50px]]

|name2=[[Blooper Nanny]]

|count2=2

|image3=[[File:BabyBlooperNSMBU.png|50px]]

|name3=[[Blooper Baby]]

|count3=(spawned 4 at a time from Blooper Nannies)

}}

|Jap=ひみつのゲッソーのそうくつ

|JapR=Himitsu no Gessō no Sōkutsu

|JapM=Blooper's Den of Secret