World 5 (New Super Mario Bros. 2)
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World 5 is the fifth normal world in New Super Mario Bros. 2. It has a sky and mountain theme, and the levels are either in the sky or on a mountain. The map music is a remix of the World 7 music from New Super Mario Bros. Wii. This world is unlocked once the player completes World 4-
Castle or World 
Flower-Castle. The boss of this world is Ludwig von Koopa.
Levels
World 5-
Rainbow
To access this level, the timer must end with the two digits '55' (that is, 'x55', where 'x' can be any number) when the player reaches the flagpole of any World 5 level. Once the level is completed, it will disappear, and can be accessed again by satisfying the above condition once more.
Mario is launched onto a moving platform, which passes through two waves of Coins arranged in arch formations, a Coin Roulette Block, another wave of Coin arches, then a large Coin Roulette Block. Two more waves of Coins fly by as the platform reaches the right edge of the screen. Fall down to end the level.
This level is completely optional, does not have any Star Coins, and is not required to 100% the game.
World 5-1
This level is notable for its many Tightropes, as well as its circulating groups of Blocks, Coins, and Koopa Paratroopas
Completing this level's normal exit unlocks World 5-2. Completing this level's secret exit unlocks World 5-
Ghost House
Star Coins
- Star Coin 1: After the blue block with white dots, there are Brick Blocks that circulate around the first Star Coin. Use the tightrope to jump on top of the blocks, and then jump to get the Star Coin.
- Star Coin 2: After the Checkpoint Flag, there is a Star Coin located inside a tightrope enclosure. Stand above the Star Coin until Mario loses his balance and falls onto the Star Coin.
- Star Coin 3: After Star Coin 2, there is a tightrope high above the next blue block. Jump off of another tightrope to reach the higher one. Above this tightrope, there are two Coins with a space between them. Jump between the two Coins to reveal a hidden ? Block with a Beanstalk inside. Climb up it to access a secret area, in which some Koopa Paratroopas are flying in a circle, and a Star Coin is circling in the opposite direction. Jump on the Paratroopas and grab the Star Coin.
Secret Exit
Go to the same secret area where Star Coin 3 was found. To the right, there is a tightrope. Jump around above the tightrope to discover another hidden ? Block with a Beanstalk inside. Climb up it, and then fall down the hole to the right to reveal another part of the area with more Paratroopas and Coins flying in circles. Jump on the Paratroopas and go to the right to reach the flagpole.
World 5-2
This level is notable for its many Lakitus and rainbow-colored blocks.
Completing this level's normal exit unlocks World 5-3.
Star Coins
- Star Coin 1: After a structure made of orange and green blocks, there is a Gold Ring above some colored blocks. Below, there is a Star Coin, with three pipes housing Piranha Plants on each side. Wait for the Piranha Plants to go back into their pipes, and then grab the Star Coin.
- Star Coin 2: Around the checkpoint, there are some rainbow-colored blocks. Above the Purple blocks, there is a larger, pink block with a P-Switch. Get a Lakitu's Cloud, press the switch, and follow the Blue Coins up to a pipe that leads to a secret area. Inside the area are some yellow pipes containing Piranha Plants, a red Koopa Troopa, a Gold Ring, and the Star Coin. The Star Coin is directly above the yellow pipes.
- Star Coin 3: After the rainbow-colored blocks over the pit, there is a small, yellow block. Get a Lakitu's Cloud and fly directly up to a pipe, following the path of coins. In the secret area, grab another Lakitu's Cloud and fly to the right. The Star Coin is near the end of the area, at the top of the screen.
World 5-3
Star Coins
- Star Coin 1: At the checkpoint flag, the player should notice three Warp Pipes. The player should enter the Warp Pipe on the right to be launched into the Star Coin.
- Star Coin 2: At the checkpoint flag, the player should notice three Warp Pipes. The player should enter the Warp Pipe in the middle to be launched up to a secret area. The player should stand on the ? Block and jump up to reveal a hidden ? block containing a Mini Mushroom. The player should use the Mini Mushroom to jump across the Mini Pipes to reach a Cannon Pipe. The player should then enter the Cannon Pipe to be launched to the Star Coin.
- Star Coin 3: Before the end of the level, the player has to jump across five Warp Pipes to reach the Flagpole. If the player enters the middle Warp Pipe, they will be launched to the third Star Coin.
World 5-
Fortress
Star Coins
- Star Coin 1: After the fences rotates for the first time, the first Star Coin is located to the right, above a fence with a Climbing Koopa.
- Star Coin 2: The room after the checkpoint flag, when the moving fences starts to split, the second Star Coin is to the right.
- Star Coin 3: Immediately after the second Star Coin, the player should go to the left, where the third Star Coin is on a Rocket Engine.
World 5-4
Star Coins
- Star Coin 1: After encountering the Gold Ring, follow the mushrooms path and throw a shell at the end of the road.
- Star Coin 2: The player must stand on the pink mushroom platform immediately after the roulette block so Mario or Luigi can find it in a secret area in the sky.
- Star Coin 3: The third star coin is found floating over an abyss between two blue mushroom platforms. The player can either bounce off the Paratroopa, or use a Koopa Troopa's shell to collect it.
World 5-5
Star Coins
- Star Coin 1: Early in the level, climb on the first Bill Blaster to make the first Star Coin appear.
- Star Coin 2: After the midpoint flag, enter into the green pipe between the two Bill Blasters to be blasted into the sky. The Star Coin is at the end of this sky area.
- Star Coin 3: At the end of this level, where the huge Bill Blaster is, the last Star Coin can be found. Jump on a Bullet Bill to make sure to survive.
World 5-6
Star Coins
- Star Coin 1: Just before the checkpoint, the Star Coin is seen to the right of the spinning platforms and above spiked platforms. The player must hit the red switch to safely collect this coin.
- Star Coin 2: After the checkpoint, Mario or Luigi must find a green pipe that'll take them underground to a room with the star coin. The player needs to use a springboard to reach it.
- Star Coin 3: Just before the flagpole, the star coin is buried underneath stone blocks. The player can only collect it with the Mega Mushroom.
World 5-Ghost House
Star Coins
- Star Coin 1: At the second group of swinging platforms, Mario/Luigi must ride the lowest platform to lead him toward the star coin.
- Star Coin 2: In the second area, The player must climb the second pole and follow the trail of coins that leads to the second Star Coin.
- Star Coin 3: In the second area, The player must climb the third pole and climb the staircase to grab the third Star Coin.
Secret Exit
The path to the secret exit (which leads to World 5-A) starts with a small opening in the ceiling near the end of the first room, before the first door, above the right extent of the second swinging platform. An invisible block containing a Beanstalk is located directly below it. Alternately, Raccoon Mario can fly up through the opening. Through the opening and up a flight of stairs, a door leads to another room with a series of swinging platforms and ropes. At the end of this room is a yellow ? switch and a Big Boo. When the player hits the switch, four doors appear. The correct door is at the top-right, behind the Big Boo which must be lured out of the way; there is no time limit to reach the door.
World 5-A
Star Coins
- Star Coin 1: Before the checkpoint, the first star coin can easily be seen in the air. The player can either jump of the grassy ledge, or bounce off a Paratroopa to reach it.
- Star Coin 2: After the checkpoint, The second star coin is found on the third pillar. The player can either jump off a Paratroopa or use the springboard to reach the top of the pillar.
- Star Coin 3: Not too far from the flagpole, The star coin is easily seen in the air. The player can simply jump to get it.
Secret Exit
At the end of the level, there are two brick blocks. While the one on the left contains a coin, the one on the right contains a Beanstalk. Use the springboard found earlier in the level to make it easier to reach. This exit leads to the green Toad House and World 5-Castle, which skips 5-5 and 5-6.
World 5-Castle
This stage contains many Cannons.
At the Boss Room, Mario or Luigi must use the cannon. Then when they fight Ludwig, he hovers to a rope. Whichever rope he goes to, the player must hit him with the cannon pointing at that rope. He must be hit 3 times to be defeated.
Star Coins
- Star Coin 1: Not too far before the checkpoint, there's a hidden red pipe that can be reached with hidden blocks. The red pipe takes the player directly to the star coin.
- Star Coin 2: Immediately after the checkpoint, The star coin is floating over the lava. The player must wait for the grating to rise from the lava to get it.
- Star Coin 3: Once the verticle rectangular grating sinks into the lava, the player should wait until he/she is able to grab the third star coin.
