Super Mario Brothers 3

Complete the game, then press Start at the ending screen. The next game will begin with 28 P-Wings per brother.

At the end of most levels (in which you get a card). Use full speed with marios that allow you to run, and hit the bottom left hand corner of the "card block". If done right you will be able to get that star each time. MUST DO THIS EACH TIME AT END OF THAT LEVEL.

When fighting Bowser in the final level of the game, his lower half will not do damage to you. That means you can avoid damage from his ground-pound attack by ducking if you have obtained a power-up at some point, or, if Small Mario, you can walk under him and through him without sustaining damage.

In the game, you need to wait until the N-Spade card game - which appears with every 80,000 points you earn - spawns and moves to the spot of a fortress on the overworld map. If you go there now and play it, the fortress will as if you had beaten it afterwards, being collapsed and unplayable. Note, however, that the bridges and locks affected by defeating the fortress normally will still not unlock or reappear, so only do this when these things are not required.

Press Select while playing a normal game to change into different Marios or Luigis (Mushroom, Fire Flower, Super Leaf, Frog, Tannokie, and Hammer Brother).

Towards the end of the Desert World you can obtain another whistle. In the top right corner in the far right hand corner of the world there is a rock directly next to the path. Use the hammer you obtained from one of the Koopa Battles to break it. Once you've found it though you must defeat two fireball spitting Koopas to get it make sure you at least have a mushroom before going into this battle just to be safe.

Receive two whistles and use one to get to the warp room. In the warp room use the second whistle which will take you to the last part of the warp room. This will get you to level 8 to defeat king Koopa.

All codes (except as noted) work for Luigi as well as Mario.

SLXPLOVS Infinite lives for Mario and Luigi
AEKPTZGA 1 life for Mario and Luigi after continue
AEKPTZGE 9 lives for Mario and Luigi after continue
ELKZYVEK Power Jumps
EZKZYVEK Super Power Jumps
EAKZYVEK Mega Power Jumps
GZUXNGEI Multi-Jumps

With the next code, if you let MArio or Luigi drop too long, you can't sky walk until you touch the ground again

SXEZSKOZ Skywalker
OXKZELSX Super speed running
XVUXNUEE Turbocharged running

You must be Raccoon Mario for the next code to work

AANZKLLA Can raise power meter while standing still so that you can fly from a standing start

PEUZUGAA Start on World 2
ZEUZUGAA Start on World 3
LEUZUGAA Start on World 4
GEUZUGAA Start on World 5
IEUZUGAA Start on World 6
TEUZUGAA Start on World 7
YEUZUGAA Start on World 8
YPXXLVGE Mario (not Luigi) can re-use items again and again
SZUEXNSO Restore powers after playing an action scene (e.g. if you were "Fire Mario" on the map screen, then entered an action scene, died or changed to "Frog Mario,"you would return to the map scene as "Fire Mario")

ZEUXKGAA Start the game as Fire Mario
LEUXKGAA Start the game as Raccoon Mario
GEUXKGAA Start the game as Frog Mario
IEUXKGAA Start the game as Tanooki Mario
TEUXKGAA Start the game as 'Sledgehammer' Mario!

If you use any of the next five codes to defeat Bowser, stand in front of the door and hold "Up". as soon as the door opens, you will pass through into the chamber where the Princess is held. If you don't do this, you may get caught in Bowser's time trap and the game will pause forever!

XUKXGLIE Start and stay as Super Mario
UXKXGLIA Start and stay as Fire Mario
NXKXGLIE Start and stay as Raccoon Mario
OUKXGLIE Start and stay as Frog Mario
XNKXGLIE Start and stay as Sledgehammer Mario
SZKIKXSE Invincibility after changing up from Super Mario (e.g. to Raccoon, Frog, etc.)With all of the following codes, you will find that you change into Super Mario if you die again:

AEOSSZPA + PAOZTGAA Change to Super Mario if you fall off screen and die
AEOSSZPA + ZAOZTGAA Change to Fire Mario if you fall off screen and die
AEOSSZPA + LAOZTGAA Change to Raccoon Mario if you fall off screen and die
AEOSSZPA + GAOZTGAA Change to Frog Mario if you fall off screen and die
AEOSSZPA + IAOZTGAA Change to Tanooki Mario if you fall off screen and die
AEOSSZPA + TAOZTGAA Change to Sledgehammer Mario if you fall off screen and die

Hold Y and press Select.

The hammer suit will make you invunderable to fire and you can kill ghosts with your hammers.