Super Mario Brothers DX Cheats (GameBoy)

Note: The following trick only works on The Lost Levels. At the game over
screen, hold A and press Start. The game will start with ten lives.

Note: This trick only works on a new game. Select the "Toy Box" option at the
main menu, then select "Fortune Teller". Keep looking at the cards until five lives are
earned. Return to the main menu and choose to play the "Original" levels. Start a new
game to begin with ten lives instead of five.
 

Go to level 3-1 and locate the two Koopa Troopas at the end stairway. Jump on the
second Troopa to trap it against the stairway. Repeatedly jump on it until the maximum of
127 lives are collected.
 

Begin a game in level 1-1. Locate the hidden extra life mushroom above the bush after
the first pipe that you can enter. Save the game at this point. Load that file to find
that you have one more life. Repeat until the desired amount of lives have been
collected. Note: Depending on how many lives are desired, this procedure may
require a large amount of time.

Accumulate at least 100,000 points in the game. Then, select Boo as a character at the
title screen.

Save and exit the game after only having one life left. Select the "Toy Box" option at the
main menu, then select "Fortune Teller". Keep looking at the cards until five lives are
earned. Return to the saved game. After losing a life, the game will start over with ten
lives.

Accumulate at least 300,000 points in the game. Then, select Luigi as a character at the
title screen.

Immediately hold A when a life is lost, and keep the button held until the map appears.

Accumulate at least 300,000 points in the Classic game without losing all lives, and
without saving and restarting the game. Then a new "Super Mario Bros. For Super Players"
game will be unlocked.

Use the "Extra lives" trick to start with at least ten lives. Then, play until reaching
level 3-2. At the beginning, hit the turtle shell and follow it until it hits all the
enemies. You should get at least 20,000 points and an extra life. Repeat this until
reaching 300,000 points to race Boo or play the Lost Levels.

Game Shark Codes

Note: You must have a 2.1 or higher version of the Game Shark
to use these codes in a Game Boy Color system.

At the map screen, press Select.

At the "You vs. Boo" mode level selection screen, press Select to cycle Mario into his
super, fire, and normal forms. Note: This also may be done in versus mode with the
link cable.

Locate one Yoshi egg, then go to the toy box and select Yoshi's head.

While playing a game, press Select to switch the screen from being centered to an edge.
Hold Up or Down to shift it up and down.

Successfully complete a level with a time that ends in a 1, 3, or 6.

Successfully complete the first quest.

At the game over screen, hold A.