Super Mario Bros. 3/World 6

World 6 is called Iced Land. Most of the levels here are frozen over, which naturally puts Fire Mario at an advantage. Since the ground is often very slippery, you need to watch your step much more than before to avoid sliding somewhere you hadn't intended to.

This is the single largest world in the entire game. It has 10 levels and three fortresses in total! There are multiple pipes here which have been colored on the map, pipes with the same color connect together.

There are three Hammer Bros here. Beating them awards you a Hammer, a Jugem's Cloud and a starman. The Hammer does not have much use here, but you might as well use it somewhere since the last two levels don't have any rocks to break.

There are two mushroom houses on this map. The first one offers the standard mushroom, flower, leaf choice, the other however has only a Hammer Suit.

(Note that in Super Mario All-Stars, the mushroom house next to level 6-2 has a Hammer Suit as well.)

6-1

 * If you're Raccoon or Tanooki Mario, start flying at the beginning of this level to get to a door, enter it to appear in the bonus area (see below).
 * This level features a new enemy: Ptooies. These are Piranha Plants, both in stationary and walking variants, that balance a spike ball over them. Both fireballs and a tail whip will defeat them easily, otherwise, jump over them as they blow their spike ball up high.
 * At the beginning, the rightmost block contains a Fire Flower. Later, you'll find another block with a raccoon leaf inside.
 * Remember that you can stand on the very edge of a pipe without getting hurt by the Piranha Plant, which can be helpful at times. It needs a bit of precision though.

Bonus area

 * Get to the top, start running and then duck. The ice will cause you to slide all the way to the P-Switch. Step on it, then slide back and collect all the coins at the bottom before they become brick blocks again. Enter the door at the end to be dropped in the air in the middle of the level.

6-2

 * This is an autoscrolling level. You have to use the cloud platforms that are moving to the left to cross the area.
 * Watch the ice platforms. They can easily cause you to slide off if you're not careful.
 * When you see an ice block, kick it against the ? block to the right for a raccoon leaf.
 * When the screen moves to the top, you can kick the two ice blocks away and gather some coins from the brick block.
 * There's a 1-up mushroom near the end, blocked off by a wall of wooden platforms. To get it, wait until the screen scrolls under the wall, then get up and jump at the block to get the 1-up.
 * The pipe at the end leads to the ending area, which is empty apart from the goal card.

6-3

 * At the beginning, jump on the note blocks and wait until you see a wooden platform underneath. Drop down on it, then duck to get under the ice wall. Once on the other side, get on the ice platform (but watch the Koopa Troopa patrolling there).
 * Stomp on the Koopa Troopa, then take the shell and kick it against the ? block on the other side of the pit for a raccoon leaf.
 * For the next part, remember that you can run over gaps 1 block wide without difficulty. However, a Koopa Troopa is walking around at the end, don't run into it.
 * When you see brick blocks, stomp on the Koopa Troopa and kick its shell against the leftmost brick block to reveal a vine. Climb it up and enter the pipe at the top to get to a bonus area (see below).
 * At the end, there's a brick block with a 1-up mushroom. To get to the goal card, you must bounce off one or both of the Para-Troopas.

Bonus area

 * Jump at the giant ? block to get a Tanooki Suit. Fly up through the brick blocks at the left side to get some coins at the top, then return through the pipe to reappear at the pipe you entered this area from.

Part 1

 * Jump on the platform, it takes you across the room. However at the beginning there will be Podoboos jumping at you which you must avoid. As Tanooki Mario you can also use your statue form to be invincible to the Podoboos.
 * In the air there's a block with a raccoon leaf inside if you wish to collect it.
 * At the end, Roto-Discs will be in your path, either evade them or, as Tanooki Mario, use the statue form to take them out. When you see a door to your right, jump off because the platform leads right into a spike pit. Enter the door to get to part 2.

Part 2

 * At the beginning, a double Roto-Disc is guarding another block with a leaf inside. You can either risk taking it, or just ignore it.
 * If you're Raccoon or Tanooki Mario, fly up after this block. At the top, there's a 1-up mushroom inside a brick block on the ground, simply use your tail to get it. At the end, you will need to dodge the Roto-Disc as you jump down.
 * At the bottom, there are two Roto-Discs and some blocks. The leftmost one of these contains a starman, which can help a lot in this room. To get further, you'll need to run and duck if you're big Mario.
 * Near the end, a Roto-Disc is spinning around yet another block with a leaf inside if you want to get it. The door leads to part 3.

Part 3

 * Run forward to meet Boom-Boom once again. Again, three stomps or five fireballs will take him out.
 * There's a weird glitch you can do here. Take the starman from the previous room, then quickly make it to Boom-Boom's chamber and if you're quick enough, you will be able to knock him out with your star power. If you do this, the sphere will appear in the middle of the room and be upside down... It still works as normal, though.

6-4

 * At the beginning, watch the lifts and cross them only when they stand still.
 * For the Goombas, you could just wait until they walk into the pit by themselves. At the bottom there's a 1-up mushroom, but it is insanely hard to collect due to the ice.
 * Step on the wooden platform, then jump onto the large ice blocks and fall back down onto the wooden platform when it reaches you. Jump along the right side of the ice blocks to uncover a pink note block (though it doesn't look pink here), jump off it to get to a Coin Heaven (see below).
 * The wooden platform will take you to a second wooden platform. You can also get a raccoon leaf from the block if you want. Cross the various wooden platforms until you get to the ice again.
 * You'll see a P-Switch, step onto it to get a few coins. If you have a P-Wing you can also fly up to get some more coins at the top.
 * The following lifts spin around indefinitely, so you need to jump over them. You'll encounter a Fire Chomp on the way, stomp on it to kill it if you wish.
 * In the lift area, if you're Raccoon or Tanooki Mario you can fly straight up to look for a hidden 1-up mushroom in the sky.

Coin Heaven

 * This coin heaven is similar to the one in 3-7. Jump around and collect all the coins. At the end, a pipe leads back into the level, to the part with the spinning lifts.

6-5

 * You cannot complete this level if you're not Raccoon or Tanooki Mario. But don't worry, the level gives you enough opportunities to pick up raccoon leaves.
 * Enter the pipe at the beginning to be taken into the underground area. It is infested with Buster Beetles which try to throw ice blocks at you.
 * The first ? block contains a raccoon leaf. From here, fly up through the hole to get a 1-up mushroom from one of the brick blocks.
 * When you see a Koopa Troopa, stomp on it, then take its shell and fly up the left hole in the ceiling. Once up, kick the Koopa shell to kill the Nippers, then enter the pipe to be taken to the ending area which is empty apart from the goal card.
 * If you're not Raccoon or Tanooki Mario, get to the end (watch out for the Piranha Plant) and enter the pipe there, it takes you to an isolated area with a raccoon leaf in a block. This area can be entered over and over. If you were wondering, the second pipe right at the beginning leads to this place as well.

6-6

 * Enter the pipe to get to an underground area, where there is a fork in the path. The top path just leads to a block with a Fire Flower, so take the bottom path.
 * Of the wooden blocks, the third one from the top contains a starman, which you can collect if you like. Otherwise, watch out for the small puddles because Cheep-Cheep jump out of them.
 * After a while, the path leads into the water, which is infested with Cheep-Cheep. If you're not Fire or Hammer Mario, you'll have to carefully evade them. Frog Mario has an easy time in the water if you happen to have him here.
 * At the beginning of the water area, swim all the way to the top to find a hidden 1-up mushroom in an alcove. Inside the water, one of the ? blocks contains a Fire Flower.
 * You'll have to evade or kill the Piranha Plants underwater, which is much harder than on land, and the Cheep-Cheep are still there to top it off. Carefully swim across to get out of the water.
 * The end of this area is infested by Spikes who like to throw their spike balls at you, so watch out. After crossing another row of water puddles, the pipe takes you to the ending area. Jump over the Spike to get to the goal card.

6-7

 * This is an autoscroller with donut blocks. Since they fall if you stand too long on them, you'll need to be jumping all the time. Sometimes (like right at the beginning), dropping down with a donut block is actually required to continue, though.
 * At the beginning, there's a block with a raccoon leaf inside, which you can get if you want. Afterwards, once the screen starts to scroll down step on the donut block to drop down.
 * A Fire Chomp awaits you, stomp on it to kill it. There are several coins here which can be only acquired by dropping down with a donut block and jumping back up at the last moment.
 * The single ? block among the brick blocks contains a Fire Flower. Afterwards, if you jump up at the ice wall you can get a 1-up mushroom.
 * The pipe takes you to the ending area. Here, there are frozen coins, which you can unthaw with Fire Mario's fireballs to collect them. There's a hidden block to the left of the coin block if you happen to fall down back there.
 * Getting 78 coins in this level (i. e. every single one of them) unlocks the White Mushroom House. This requires you to be Fire Mario at the end to get all the frozen coins there.

Part 1

 * This entire fortress is icy, which makes it very slippery. Therefore, carefully watch your step!
 * If you're Hammer Mario, this fortress becomes very easy since you can kill all the Thwomps and also the Boo Diddleys scattered across the room. You just need to watch out for the Roto-Discs, and of course the ice itself so you don't fall into a pit.
 * At the beginning, take the middle path, run and drop down before the Thwomp can get you.
 * The first block contains a raccoon leaf. Later on, there's a second block with another raccoon leaf.
 * At the second Thwomp, let it charge, wait until it moves back and use the moment to jump up and run over. There, again wait until the Thwomp has charged and then immediately drop down. Run forward, jump up onto the small ice block and repeat the procedure. You'll need to duck to make it under the ice blocks.
 * Watch out for the double Roto-Discs. On the slippery ice, they're much more dangerous since you can slide into them very easily. Only Tanooki Mario has an easy time here since he can use his statue form.
 * On the second-to-last Thwomp, again drop down after he has charged. Then, run forward and jump up to the door before the Thwomp can get you. The door leads to part 2.

Part 2

 * Run forward and you'll see Boom-Boom standing on a platform. He is no different from before, but the ice makes things much harder. Again, stomp on him three times or feed him five fireballs to defeat him.
 * If you're Hammer Mario, lob a single hammer at Boom-Boom. He will die instantly, making it a very easy win.

6-8

 * Use one of the ice blocks at the beginning and kick it against the block to reveal a raccoon leaf. You can use another ice block to kill the Ptooie if you wish.
 * After the pipe, stomp on the Koopa Troopa, then take its shelll, kick it forward and run behind it. This will kill all the Nippers and Buster Beetles on the way.
 * The block enclosed in ice blocks contains another leaf. Over the right side of the "H" is a hidden block with a 1-up mushroom inside. Be sure to take one of the ice blocks to kill the Nippers ahead.
 * At the end, the leftmost brick block has a P-Switch (duck and jump at the brick block to uncover it). If you're Raccoon or Tanooki Mario, step on it then fly up to find a large formation of coins in the sky.

Part 1

 * If you're Raccoon or Tanooki Mario, you can fly over the ice structure to skip the entire level! At the top, there's a single Koopa Troopa guarding a 1-up mushroom. Get it if you want, then fall down behind and collect the goal card to finish this level.
 * In all other cases, enter the pipe ahead to get to part 2.

Part 2

 * You'll land in the water. Ahead, you'll find a new enemy: a Blooper Nanny. She releases her kids which then follow you around, even outside the water! At the beginning, it's best to get to the surface as soon as possible and jump onto the wooden block.
 * If you're Frog Mario, however, continue to the right. Dodge the Big Bertha and swim straight through the water currents. Go down the pipe at the end to arrive in a bonus area (see below).
 * At the surface, there are Munchers which you have to jump over. Afterwards, cross the pit when the Piranha Plant at the top is not out. The next jump must be very precise as you need to jump over six munchers, which is very hard. On the other side, the block contains a Fire Flower.
 * Run over the pits when the Piranha Plant is not out, then fall into the water. Again, get out of the water as soon as possible.
 * Jump over the Munchers, and at the top you'll see a brick block, jump at it to reveal a P-Switch. To get to it, you must find a hidden block just nearby, which allows you to get up. This P-Switch transforms all the Munchers into coins, so collect all the coins you see on the ground.
 * At the end, go down the upwards pipe before the pit to end up in the ending area. There, collect the goal card to end this level.

Bonus area

 * Jump at the giant ? box to get three 1-up mushrooms. Afterwards exit through the pipe to appear just before the second Blooper Nanny.

6-10
Your best friend in the first half of this level is definitely a fire flower. After finding a white Vine, climb it and get a P-switch. Turn the frozen Munchers above a pipe into coins and go into it to get a Hammer Suit!

Fortress
Practice killing Thwomps, Boo Diddlies, and Stretches in this fortress if you have your Hammer Suit on. Rotodiscs and Spiked teeth, however, must be avoided even if you're Hammer Mario. In the second room, which will have a floor moving up, there are just 3 Boo Diddlies that you can kill with Hammers, but otherwise you must simply avoid. The room will rise, and enter the door at the right side of the room to get to Boom Boom's room.

Airship
The king has been transformed into a seal. This blue airship has enemies just like those in earlier airships. After entering the pipe, kill Lemmy Koopa 3 times. If you still have the Hammer Suit from 6-10, the king will say, "Hey you! Shall I borrow your clothes?? No dice! What a drag!" The Princess will give you a P-wing.