World 6 (New Super Mario Bros.)

Mario & Luigi, after defeating Petey Piranha, traveled on to World 6. It was a world in some mountain ruins, though some levels were in different terrain. It had 2 towers but no ghost houses. The castle, at the end, came after a level infested with Chain Chomps, Koopas and Warp Pipes.

The boss is Monty Tank, and he fires Bullet Bills at Mario or Luigi. He may pop out to throw a Bob-omb into the mix.

6-1
This level is filled with Bullet Bills. When Mario reaches a thin floor,he can either hang onto it or walk on it. When Mario is on the thin floor, it is hard for him to jump. If Mario Wall Jumps on the wall after the thin floor, he will get the first Star Coin. After the checkpoint, Mario should jump to the left to get the second Star Coin. Below another thin floor, after many Bullet Bills, is the final Star Coin. After the third Star Coin, Mario will reach the Flagpole.

6-A
Lakitus will be chasing Mario in this level. Soon after the first Lakitu is a large tornado. If Mario jumps into it and keeps going right, he will get the first Star Coin. Later, Mario should be met with two Lakitus at once. The player should see a part of the quicksand that is higher then the rest. If Mario goes into it, it will take him to an area containing the second Star Coin. After the checkpoint, Mario should find an area with several pipes. Mario should enter the single yellow one to go to an area with the third Star Coin (and a Super Piranha Plant). When he exits out of a red pipe, he should enter the green one next to it. After exiting a Warp Pipe, Mario will reach the Flagpole.

6-2
This level has water that can rise. After the Red Warp Pipe, the player should see a ? block with two coins above it. In between those coins are two invisible blocks, one containing a Beanstalk. Climb it and press a P-Switch, jumping across some flying blocks to get the first Star Coin. Soon after that, Mario should reach two tall cannons. One takes Mario to a bonus area, and one takes you to the second Star Coin. Mario can get the last Star Coin by going past a few Spinies. When Mario goes through the yellow Warp Pipe, he will reach the Flagpole.

6-Tower
In this level, the spiked bars return. Mario must jump before the spikes can damage him. Mario can get the first Star Coin by ducking to avoid a spiked bar and by jumping to it. After the checkpoint, Mario must quickly jump up to avoid the spiked bars below him. After the door is another area similar to the previous one. Mario should get to the top before getting the second Star Coin. To get the last Star Coin, the player must be Mini Mario. Mario must Wall Jump to a Green Warp Pipe. Enter it and avoid the four spiked bars to get the last Star Coin. This time, Mario is able to jump on Bowser Jr.. This fight takes place on a tilting platform.

Enemies introduced

 * Deep-Cheep
 * Chain Chomp
 * Mega Deep-Cheep
 * Firebar