Mario Brothers

Continue game play:
After a game is over, go to one player mode, then hold A and press Start . The game will resume at the last world played.
Information in this section was contributed by Tobey Payton.

Hint: Extra lives:
Play until World 3-1, then go to the stairs just before the flagpole. Two turtles will come down the stairs. Kill the first one and walk to the first block. Get right next to the block and wait for the second turtle. As it gets on the first block, jump on its head. If done correctly the turtle should be sitting on the first block with it head in its shell. Then, jump on the edge of the shell. Do this repeatedly to get extra lives. If this trick fails, return to the pit and fall, then try again.
Information in this section was contributed by Dpyles.

On World 1-1, when you jump over all of the tubes, after the last one (where you have to jump over the first ditch), go to the back of the green hill in the background and jump. A box will appear with an extra life.
Information in this section was contributed by LiLIronMan89.

Hint: Warp zones:
In World 1-2, you can get to a warp zone by getting "on top" of the level. When the platforms move up, jump on the high row of blocks. Then just run across until you fall into a warp zone. You can now go into any World up to 4.
Information in this section was contributed by Mike M.

In World 4-2 you can get to a warp zone by getting "on top" of the level. When the platforms move up, jump on the high row of blocks. Then, just run across until you fall into a warp zone. You can now go to World 5-1.
Information in this section was contributed by gerald tomisman.

In World 4-2, when you go past the first moving ladder, there will be two blocks above you. Jump one block after the second one, go up and break the second block, then go back down. Jump under where the second block was located, then jump up and break the other block. A vine will appear. If you climb up it, you will be brought to a warp zone where you can warp to Worlds 6-1, 7-1, or 8-1. In order for this to work, you cannot jump underneath the block where the vine comes out of. If you do this, you will not be able to hit the block with the vine.
Information in this section was contributed by InteruptingCow13.

Hint: Slide with one foot:
Hold A + B after you exit of the green tube. You will slide with one foot in the air. Keep holding A + B until you stop sliding.
Information in this section was contributed by MetallicaMike45.

Hint: Fireworks:
At the end of each level, when you hit the flag post look at the clock at the top right corner. If the "ones" digit is "0" or "6" you will get 6 fireworks. If the digit is "3" you will get 3 fireworks. If the digit is "1" you will get one firework. Any other digit results in no fireworks.
Information in this section was contributed by David Kirkman.

Glitch: Missing Mario:
Go to any Boss level, except for the final level. Make sure Mario is small when reaching the Boss. Jump on the small ax object so you hit Koopa (Boss) and the ax at the same instant. You will die but can continue on. Toad will talk as if you were there then the game will continue on without you losing a life.
Information in this section was contributed by Shermdaddy20012.

Glitch: Small Mario with fire ability:
Go to any Boss level, except for the final level. Make sure Mario has the fire ability when reaching the Boss. Jump on the small ax object so you hit Koopa (Boss) and the ax at the same instant. You will die but can continue on. Mario will be small but retain his fire abilities.
Information in this section was contributed by Dedbunniez.

Glitch: Small Luigi with fire ability:
Select a two player game, but leave controller two unplugged. Play on as Mario until you have died. When it is Luigi's turn and he is on screen, after a few seconds the color of the sky will change from blue to a greenish color. Plug in controller two, and Luigi will shoot fire as a small character. As you hit the block which contain mushrooms or flowers, a flashing squid will appear. When you get it, you will have the star capabilities. When you get hit without a star, Luigi will grow from small to large and lose the fire power. When hit again as big Luigi, you will die.
Information in this section was contributed by brandon lawhon.

Glitch: Falling King Koopa:
When facing King Koopa, if you have the fireball and kill him with it, he will fall from the bridge in three variations:
Information in this section was contributed by Gregory Lawrence.

As a green Koopa shell.
As a gray Koopa shell.
As a gray Goomba.