List of Super Mario Bros. 3 glitches
Template:MoreImages These are the glitches found in Super Mario Bros. 3
Glitches
Template:Conjecturaltext
In the Fortress level of Dark Land, the player must go through several doors in order to battle Boom-Boom. There are some Question Blocks which contain items near a door. If Mario hits one of these blocks and enters a door quickly, before the item appears, the next time he go to that area will have a permanent used block. It'll stay there unless losing a life or complete the level.
Template:Conjecturaltext
The player should have Mario wag his tail a fraction of a second after collecting a 1-Up Mushroom to hear an extended 1-Up sound effect. The exact moment to wag Mario's tail at 1/12 of a second after the 1-Up icon appears. The two sound effects will conflict, causing the game to play extra notes at the beginning of the 1-Up theme.
Template:Conjecturaltext
It is possible to remove Bowser's ability to spit fire. It works in the NES version and the Super Mario All-Stars version, but not in the Super Mario Advance 4 remake.
The player must use a P-Wing before entering Bowser's Castle. After climbing the stairs protected by Roto-Discs, the player must duck, then fly onto the ? Block, and stand up; the player will glide through the wall. (This isn't necessary for the trick to work, but makes it easier to keep Mario's P-Wing activated.) The player must fly through the lava chamber and, when presented with the four corridors at the end, take the one guarded by the Thwomp. The player must then fly through the hall of statues and enter Bowser's chamber.
Once the player has entered Bowser's chamber, the player should fly straight up to the left. The player will pass over the wall. When the player reaches the end of the wall, they must stop. If they keep going, the player will land in Bowser's alternate room and fight him there. Instead, the player must return to the chamber they came from. Next, the player has to walk to the right, and Bowser will spawn. He will make belching motions at Mario, but will be unable to produce fire.
Template:Conjecturaltext
This works in the NES and Super Mario All-Stars versions, but not Super Mario Advance 4.
The player has to go to Bowser's Castle. After passing the Donut Lifts, the player will have to take the upper route. The player will follow the route until Mario/Luigi reaches the door at the end. Instead of entering it, the player must fly to the Bowser statue just before it and ducks. The player ducks on top of the Bowser statue, and after doing so the player has to fly through the wall. This will make the player end up in the room that would have been reached if the player had taken the lower route found after the Donut lifts.
Template:Conjecturaltext
As Tanooki Mario, if the player presses 
right as when Mario goes down a pipe, he will turn grey, but not into a statue.
Template:Conjecturaltext
This glitch can be found in World 6-10. The player follows the route until they reach a pipe with the Hammer Suit in it. If Mario enters the secret room and breaks the ? with the Hammer Suit, he will go up to the top of the hill, and he will still slide even with the Hammer Suit on.
Template:Conjecturaltext
In world 1-1, there are some Paratroopas. Mario needs to jump on one of them when they are at the highest point of the bounce. Mario will go offscreen and will not come back. He is actually in the bonus area although the screen didn't scroll there. If he hits the block that has the 1-up mushroom, the block is visible on the bottom side of the screen while it's being hit.
Template:Conjecturaltext
This was shown in a Super Mario All-Stars Limited Edition Super Play video. To do this, Mario must stand on two donut lifts and one of them won't fall.
Template:Conjecturaltext
This glitch has not been tested outside the Super Mario All-Stars version. However, it should be impossible in Super Mario Advance 4 and most likely would require getting a game over on purpose in the original due to the lack of a save feature. In All-Stars, the player should start a new game, get the 2 warp whistles, save and quit, then return to this save-game. The castle will remain destroyed, but all other completed levels, toad houses, spade panels, and the hammer bro. will re-open. The player can then re-play level 1-3 to get a 3rd warp whistle, and replay any other levels required to get any other extras he/she wishes. The player should then save and quit, return to the game, and repeat these steps as many times as he/she wishes, or until the player's inventory is full.
Template:Conjecturaltext
This glitch works in the Tower in World 5. First, the player must start the level with a P-Wing. The player should fly to the area full of bricks. (There should be two Micro-Goombas there too) The player should then fly to the pipe and then go above it. Then keep going right until they get over the pipe into an area behind it. There is also a brick with a 1-Up back here. Over to the left, the player should see a wall of bricks. Mario should then fly over to them and whip them with his tail to make a spot to stand on. The player should then make Mario fly upwards off the screen for a while, he/she will start seeing "invisible" blocks being broken at the very bottom of the screen.
Template:Conjecturaltext
The game can't stand with two or more items in the screen, so, if there's an item in the screen and another appear, the first item will disappear.
Template:Conjecturaltext
With Tanooki Mario/Luigi, the player must enter a Koopaling battle, then fly up to off-screen and turn into Statue Mario/Luigi. The "poof" smoke will be in the ground, however, Mario will not be there.
Template:Conjecturaltext
This works in the NES version of the game, but not in Super Mario All-Stars nor Super Mario Advance 4 versions.
This is a glitch from level 3-9. In it, the player plays with the Ice Blocks on the right side of the Pipe as follows: Mario ducks, getting rid of the bottom 3 ice blocks on the right side of the pipe, but keeping the ice block on the far top. Then he should duck and jump and he will suddenly go down the side of the Pipe. Fire Mario can still shoot fireballs, but Mario won't be able to get out of the pipe. The player can just scroll left and right, but Mario won't appear. Moreover, the player won't return to the map screen until 5 minutes after time runs out.
Template:Conjecturaltext
This works in the NES and Super Mario All-Stars versions. Whether it works in Super Mario Advance 4 is a meaningless question because a Fire Flower changes small Mario to Fire Mario normally in Super Mario Advance 4.
This glitch is in level 5-7. The player starts 5-7, and Mario should be Super Mario. Mario should jump into a block to make a Fire Flower without getting it right away. Instead, Mario collects the first coin to the right of the flower and it starts to flash. Then, a Micro-Goomba hits Mario so that he can downgrade to small, and he grabs the flower, and he becomes Fire Mario immediately.
Template:Conjecturaltext
This glitch can be performed in 6-10. Mario should start the level with Star (without Frog Suit). The player should then quickly break the block with Vine and climb on it. Mario will still somersault even when he loses his Star.
Template:Conjecturaltext
To do this glitch, the player must wear Tanooki suit, then go to the ? Block with Frog or Hammer Suit in. When the item jumps off the block, they must stand near it and turn into a statue. When the item hits Mario, he will be a statue-colored frog or Hammer Bro.
Template:Conjecturaltext
In the beginning of 5-2, If Mario has a Tanooki suit, he must transform to a statue on the slope, then he slides down the slope to the far left of the screen, then he dies.
Template:Conjecturaltext
This glitch only works in NES version. In 5-3, with a Super Leaf or Tanooki Suit, the player should hit a Spiny and hold its shell. While doing so, Mario should get into a Kuribo's Shoe. The shoe will become transparent and Mario's clothes will become black.
Template:Conjecturaltext
To do this glitch, the player must land in a Kuribo Shoe while in statue form. Mario will be grey, and everything will play normally, except Mario will be invincible.
Template:Conjecturaltext
When Mario's foot catches off a pipe or wall, he can jump again to do the wall jump.
