Super Mario Bros. 3/World 7

World 7 is called Pipe Maze. Just if you look at the world map, you'll see that this really holds true - it is a giant maze made of pipes that you have to find the right way through. On this map, all the pipes have been colored, and pipes with the same color connect together, which should help you to find the right way.

And just as the world map looks complicated, the levels here are very challenging. It takes very good skills to make it past some of the puzzles presented in this world, and you will need to use all your knowledge to beat some levels.

There are no Hammer Bros on this map. Instead, there are two Piranha Plants, which however are full levels unlike the Hammer Bro fights.

This map has three mushroom houses. The first one on the left offers the standard mushroom, flower, leaf choice. The two other ones, on the other hand, have a Frog Suit, Tanooki Suit and a Hammer Suit available.

Part 1

 * There's nothing really to do here, so enter the door ahead to jump in and get to part 2.

Part 2

 * This is a vertical level where you have to get from the bottom to the top. Remember that in vertical levels, you can go sideways beyond the screen boundaries to end up on the other side, so for example, running off to the left makes you reappear on the right side of the screen.
 * At the beginning, simply jump up all the pipes, and once at the top, take the rightmost pipe to get to the other side. Here, you'll have to dodge or kill the Piranha Plants to enter the pipe at the left which leads upward.
 * Once at the top, you can jump around the blocks to get to a hidden block with a 1-up mushroom inside. The required jump is very tricky, though. Then fall down, and take the left pipe to progress.
 * You can kick the Koopa shell against the left ? block on the ground for a raccoon leaf if you want. At the top you can get another hidden 1-up mushroom if you want, afterwards, climb all the way up to the Piranha Plants.
 * You can stand on the very edge of the pipe without getting hurt by the Piranha Plant, use this to your advantage. At the top, jump on the note blocks and bounce off onto the pipe when the Piranha Plant is not out (it won't come out if you're standing on top of it).
 * If you want to get some coins, go to the right so you appear on the left side, then jump to the pipe at the top to get inside the coin area. Get all the coins, then take the top pipe to appear at the top. Otherwise, just use the blocks to climb up the structure.
 * At the top, there are two green Koopa Troopas patrolling. You can use the small gaps in the ceiling to stomp on them easily (don't kick the shells as it makes it very hard to get through this area). Climb to the top, evade the red Para-Troopa, and enter the pipe to get to part 3. As Raccoon or Tanooki Mario, you can get the third hidden 1-up mushroom beforehand by flying over the red Para-Troopa.

Part 3

 * This is the ending area. Just run across and pick the goal card to finish this level.

7-2

 * The Nippers you see in this level actually walk around. This means you have to be extra careful, especially when they decide to drop down on you from a pipe.
 * The first ? block you see contains a Fire Flower, use the ice block to reach it.
 * When you see an area with a green Para-Troopa inside, drop down. Attempt to get back up and you'll notice that there are invisible note blocks forming a ceiling over the entire area. Go down the left pipe to end up in a water area, then swim to the left and take the next pipe to get back up. You can now use the note blocks to cross the area like a bridge. There's also a hidden 1-up mushroom here which you can get using the note blocks.
 * Get all the way back and take the fourth pipe from the right to go down, then take the next pipe to land in the ending area. Grab the goal card to end this level.
 * Collecting 46 coins in this level unlocks the White Mushroom House. This can only be done as Frog Mario. Enter the level with him, then go down the pipe with a Nipper standing on it to land in a water area. Swim all the way to the left and you'll see some coins and a P-Switch. First collect all the coins, then step on the P-Switch, and very quickly jump into the water and collect all the coins near the water surface. The timing is very harsh and it's extremely hard to make it in time.

7-3

 * This is a "race" of some sorts. Jump at the first block for a starman, then run across and collect the continuous starmen before your own runs out.
 * The star allows you to simply run through any enemies you encounter. Halfway through, Lakitu will join in and start throwing Spinies at you.
 * There's a P-Switch around but it's not worth it, it just makes eight coins appear. There are also some infinite Goomba generators which you can ignore because of Lakitu.
 * At the end, you can try the 1-Up trick from World 5 again, it works on this level as well.

7-4

 * If you're Raccoon or Tanooki Mario, you can fly up at the beginning to get to a secret area with two 1-up mushrooms. Afterwards, return and get into the pipe.
 * This is an autoscrolling water level. Spiny Cheep-Cheep are coming in from both sides. Fire and Hammer Mario have an advantage here since they can knock out many of the obstacles here. The first block you see happens to contain a Fire Flower.
 * After a while, the screen will scroll into a group of Jelectros. You must swim precisely to make it safely across. At the end, you must also avoid the Big Bertha swimming around here.
 * Once you're done with the field, there is another block with a Fire Flower inside. Afterwards, simply swim through the small maze to get to the pipe leading to the ending. There, collect the goal card to finish the level.

7-5
This is a maze with several rooms. Follow the pipes and try to search for a route that no invisible blocks will block you from getting to. Located in the middle of the level is a group of Ice Blocks with a Troopa inside them, just after a pipe.

(Variant: In Super Mario All-Stars, the ice blocks were moved one step to the right to prevent a glitch; see the info in 3-9 for what it is.)

Piranha Plants
Just follow to your right and avoid the plants. You'll be in a secret room and get a P-wing!

Fortress
Raccoon Mario can fly right to the top section of the fortress to fight Boom Boom. However, it's wise to go after the Tanooki Suit hidden in this fortress that you have to get anyway if Mario cannot fly yet. You can get into the hall either by entering the door at the end, or by finding a P-switch to turn all the bricks into coins and going to the bottom and entering that door. Either way, you'll end up in the same room. In this room, go to the right and don't enter the door at the very end. Instead, when you get there, fly to the left and enter the vertical pipe to get to Boom Boom's room.

The suit can be found by entering a hidden door that appears on the 3 by 3 solid block section right at the beginning after pressing the P-switch. Go down the first pipe and hit de giant ?-block to unlock the suit. Exit the bonus room, enter the pipe at the right, go left and through the door to enter the hall where you have to fly up to enter the up-side-down pipe that leads to Boom Boom.

7-6
If you have a P-wing, you can simply fly over the wall and get to the end of the level. Otherwise, enter the door and you'll be in a room similar to World 4's second fortress. Get up to the pipe, because of the spiked teeth, you'll need to be on a lift to get to it.

7-7
This level is just a line of Munchers. You need a starman to get by them.

7-8
This level has lots of enemies. It also has a beige block that will take you to a sky room identical to the one in 3-7 except that it ends with a pipe that leads you back to the main level. It also has a secret room with a Hammer Suit in it.

7-9
In this desert level, you just search as hard as you can for the root to the exit pipe.

Fortress
If you're Hammer Mario, you can practice killing enemies just like in World 6's third fortress. There are no secret rooms in this fortress, just enter the Pipe at the end and get to Boom Boom's room.

Piranha Plants
Just like the first one. Unfortunately, unlike the previous Piranha Plants level, the prize you get is a not-so-exciting Super Mushroom.

Airship
The King has been transformed into a Piranha Plant. Use bolt lifts here. At the end is a strong boss who is very hard if you don't have a P-wing. At the end, after getting the wand, the king will lie. He says "Here is a letter from the Princess", but it is not, it is from King Bowser, saying he kidnapped the princess!