A guide to completing World 6-6 in Super Mario Bros 3 for the Nintendo Entertainment System.

How to Clear World 6-5

Go to the right and go through the pipe.

You will fall down into an underground area. To the right, the path splits into an upper path and lower path.

If you go up the upper path, there are 11 coins to collect, but there is also a Spike that spits spiked orbs, and a Cheep-Cheep that jumps from the second puddle to the third, and another Spike at the end. Above that Spike, there is a ? Block that contains a Super Mushroom or Fire Flower.

At the beginning of the lower path, there are Wood Blocks. The upper Wood Block above the first puddle (which has a Cheep-Cheep jumping from it) contains a Starman if you hit it from the side. Be careful to dodge the Cheep-Cheep, and try to run to the right to hop over the puddles and reach the Starman. You can use the Starman to defeat the Cheep-Cheep that jumps between the third and fourth pond, the Piranha Plant in the pipe above, and the Spike.

Jump onto the ledge on the right, and if you're still invincible, you can slide down the slope to defeat the Venus Fire Trap in the pipe below, then run up the next slope and defeat the Venus Fire Trap in the pipe above.

Next, there is an area of water, with Green Cheep-Cheeps throughout. Go up and to the right to find a dead end, where you can find a hidden ? Block if you go above the surface while you're one space to the left of the wall on the right. The hidden block contains a 1UP Mushroom.

From the dead end, go to the left and go down, and keep in mind that you can't hit enemies with your tail while swimming. Then go to the right. You will reach some Wood Blocks. There are also two ? Blocks, and the second one contains a Fire Flower.

From the ? Blocks, go downward until you can go to the right. After the hole in the floor, start going up and to the right. You will reach a set of four pipes with Piranha Plants coming out. Get past these pipes and exit the water.

There are three Spikes, followed by a Venus Fire Trap in a pipe, then a set of three ponds with a Cheep-Cheep jumping back and forth.

After that, there is a Spike, then a pipe. Go up the pipe.

There is a Spike, and then the Goal Block. Hit the Goal Block to complete the level.

After the Level

If you haven't alreayd, you can optionally visit the Spade House for a chance to get 1UPs.

If you haven't done World 6-5, you can optionally do that now. Or you can go to World 6-7, or if you have a hammer, you can use it to break the rock to the left of World 6-7 to reach the second fortress of World 6.