New Super Luigi U (WiiU)
The following courses contain secret exits:
Grab a Super Acorn before going for this secret exit. When you're under the pipe that takes you to the standard exit, jump and glide over to the right, following the trail of coins to another platform. Do a ground-pound near the arrow sign to break through the hidden brick floor, then go right and up to the yellow pipe, which leads to the secret exit.
This secret exit leads to Acorn Plains-Cheep Cheep.
As Super-sized Luigi, ground-pound the center of the dirt platform located next to the mini-pipe. Under the hidden brick floor you'll find a green pipe that will launch you to the secret goal area.
This secret exit leads to Layer-Cake Desert-Piranha Plant.
Sparkling Waters-Ghost House
At the end of the main area, there's an upside-down pipe that leads to the standard goal and a wall on the right side of the screen. Swim through the wall panel in the lower right to find the hidden pipe that leads to the secret exit. If you're Fiery Luigi, take out the fish first for a stress-free swim to the pipe.
This secret exit leads to Sparkling Waters-Leaf.
Frosted Glacier-Ghost House
Jump into the ceiling gap above the first set of circling Boos, then wall jump to the right. The wall on the right will vanish, revealing a hidden platform for you to land on. From that platform, jump on top of the ceiling to the left. Keep going left until you drop down to a door behind a false wall. Go in the door to find the first Star Coin and the secret exit.
This secret exit leads to Frosted Glacier-Fliprus.
Bring a Super-sized Luigi to the last triangle-shaped platform that dips into the poison water. Stand on the center block, then ground-pound through the bricks to hit the Question Block on the bottom. This will make a Question Switch drop down onto the roll-out platform nearby. When you hit the switch, a row of Brick Blocks will appear above the poison so that you can reach the green pipe obscured by the trees. The pipe will launch you to the secret goal area.
Soda Jungle-Ghost House
Beware of the Boos! The hardest part of finding this secret exit is keeping your flying squirrel power until the end. When you reach the door that leads to the standard exit, jump and glide to the right until you reach another platform with a door on it. Grab the Star Coin, then take the door to the secret exit.
This secret exit leads to Soda Jungle-Para-Beetles.
Stand on the green pipe near the flagpole and you should see an upside-down red pipe above you. Jump on the blue pipe when it swings toward you, then jump into the red pipe from the end of the blue pipe. You'll be in the secret goal area when you come out of the red pipe.
Ground-pound the second stone-eye platform to make it fall backwards behind the wall on the right. Once it's out of the way, you can walk through the wall into a hidden area. Keep going to the right to find the secret flagpole.
Rock-Candy Mines-Tower 1
You'll need to be Super-sized Luigi later on, so grab the power-up from the first Question Block if you need it. Near the boss door there's a section with a bunch of Brick Blocks blocking your path. Wait for the two Grrrols to break through the bricks, then use the remaining blocks to reach the horizontal green pipe above you on the left side of the screen. In the next room, ground-pound the center of the floor, and you'll land in a pipe that will shoot you to the secret exit.
This secret exit leads to Rock-Candy Mines-6.
Use fireballs or a Koopa shell to take out the second giant Piranha Plant, then jump onto the now-empty platform. When the platform reaches its highest point, jump to the top of the ceiling on the left and you'll be warped to the secret goal area.
Meringue Clouds-Ghost House
Stay on the first moving platform as it drops down, and it will take you right to a platform with a door on it. Just be sure not to stay on the falling platform too long, or you'll fall to your doom. The door will take you to the secret exit.
Shortly after the second Star Coin, there's a section with a long row of Brick Blocks above a row of three Brick Blocks. After a fireball breaks part of the brick ceiling, jump on top of the bricks and walk through the wall on the right. Behind the wall there's a hidden pipe leading to the secret goal area.
This secret exit leads to Peach's Castle-4.