New Super Mario Bros./Walkthrough

Power-ups
Power-ups for the game include the Super Mushroom and Fire Flower from the original Super Mario Bros.. New power-ups include mini mushrooms that can turn Mario tiny, as well as ones that can make him a giant and Shell Mario, which is Mario wearing a Koopa shell.

Super Mario
You become Super Mario by getting a Super Mushroom. If Super Mario is hit by an enemy he'll turn back into standard Mario.

Fire Mario
You become Fire Mario by getting a Fire Flower. As Fire Mario, you are able to throw fireballs.

Mega Mario
New to this game are Mega Mushrooms which turn Mario into Mega Mario for a short time. As Mega Mario, you are able to smash enemies, blocks and pipes by walking into them. A meter at the top of the screen keeps track of the amount of damage you have caused. The higher the meter is when the mega mushroom wears off, the more 1-ups you receive.

Mini Mario
A blue Mini Mushroom will turn Mario into Mini Mario. As Mini Mario, you are able to go into small pipes and down narrow paths. You can also walk on water and do floating jumps. If Mini Mario is hit by an enemy, then he is killed. Stomping an enemy as Mini Mario will make him bounce off, you must make him Ground Pound to stomp an enemy.

Shell Mario
Special blue Koopa shells will turn Mario into Shell Mario. Dashing left or right as Shell Mario will cause Mario to do a Shell Dash. To stop Shell Dashing simply release the dash button. If Mario is hit by an enemy while not Shell Dashing, he'll turn back into Super Mario. Mario swims faster and has more agility in water but he has decreased jumping abilities.

Items
Several items from previous Mario games return in New Super Mario Bros. including the coins and Mushrooms etc., however the game does feature some new items exclusive to this game.

? Block
? Blocks can be found on most levels. Hit them from underneath to revile another item. If the ? block is on the ground (so you can't hit it from below) simply throw a shell at it.

Coins
Coins have featured in many Mario games. Every 100 collected gives you an extra life.

Starman
Also returning is the Starman. The Starman gives you tempory invincibility as well as improving your dashing and jumping abilities.

1-Up Mushroom
These green mushrooms give you an extra life.

Brick
Also regally found in levels, bricks can be hit from below. Some will simply break, while others will revel items. New to the Mario series, many bricks are one-coin blocks.

Star Coin
New to this game are Star Coins. Every level has three Star Coins hidden through out. They are used to open up new routs on the map screen.

Red Ring & Red Coins
Passing through a Red Ring will make eight Red Coins appear. If you successfully collect all eight, an item will appear onscreen.

World 1-1
The first level of the game. There is a Mega Mushrooms in the first ? block after the first pipe. The first Star coin is just after the second pipe. Jump on to the pipe, then jump on the bricks to get it. For the next Star Coin, jump down the third pipe (Stand on the pipe and press down). This will lead you to an underground area. The Star Coin is at the end of this. Jump on the pipe to get it. The last Star Coin is under some bricks. If you went through the underground area for the second coin you'll have to go back to get it. Stand on the bricks, jump and when you are in the air press down to Ground Pound for the Coin.

World 1-2
This level takes place underground. Near the start of the level you'll see coins under some bricks. You can get these by Ground Pounding the bricks. The third one when Ground Pounded all the way down will lead you to a room with 31 coins. Continue right and you will see the first Star Coin for the level. Jump on the bricks to get up to it. The next star coin is under some bricks later in the level. Ground Pound them to get it. The first pipe after the half way mark leads to a hidden room. Inside this room is a Koopa. If you jump on the Koopa and get him to break all the bricks under the pipe, it is possible to run along this passageway. This is easier to do if you are regular Mario, but can be done if you are big by running towards the passageway and pressing down to slide under. This passage leads to another hidden room full of Gumbas. At the far end of the room is a ? block which contains a Mega Mushroom. Just before the end of the level, use the sea-saw to jump up to the ceiling and run along it past the pipe. This will lead to a hidden room where the last Star Coin. The pipe leads to an alternative exit which opens up a hidden path past World 1-3.

World 1-3
Go right until you get to the first Spin Block. Use it to jump up to the platform above. There you'll see another spin block, use it to jump up to yet another platform where the first Star Coin is located. You should be able to see a trail of coins to the right. Follow this trail down and it will lead you to the second Star Coin. The third Star Coin is just after the half way point.

World 1-Castle
This level contains lots of moving blocks which can squash you if you are not careful. The goal is to make it all the way to the top. The first Star coin is easy to find on the way up, and is also easy to collect. Just above that you should see a green pipe. Don't go into the pipe and instead take the path with the moving spiky blocks to get the next star coin. After you get to the top, go to the left and drop down. Keep holding right as you fall to land on the ledge with the door. Go through the door to get to a room with the final star coin.

World 4
To get to this world you need to beet the boss of world 2 as mini Mario.

World 7
To get to this world you need to beet the boss of world 5 as mini Mario.

Cheats

 * Play as Luigi:At the "Select A File" screen, hold L + R and press A to play as Luigi.
 * Coin block:The number of coins you get from a coin block depends on the time between your first hit from the block and your second hit etc., so if you ground pound a coin block from above as Super Mario and keep pressing down on the D-pad, you can get the maximum number of coins(14) and a super mushroom. You cannot stop or you won't get a super mushroom. You can also do this within a tight space between the platform you are standing on and the coin block and hit it at a regular interval.