Door of doom
                       In 5-1, pull out the Potion, and use the rolling logs to get on top of the tall wall before the door to Birdo. Throw down the
                       Potion so the door forms off-screen, then take a few steps and press Up to go in the door. You will die as soon as you
                       enter Sub-Space.
                       -- [Sent in by TeamRocket2002]

                            Fixed in Super Mario All-Stars?: Yes; no door is made off-screen.
 

                       Life meter glitch
                       When you pull up a Rocket, pause the game before the Rocket takes you to another screen. Perform the suicide code
                       (Up+B+A on Controller 2 while paused, then unpause). When you unpause, your character will have no dots filled in the
                       life meter, but the Rocket will take you up to the next screen, explode, and drop you off as usual. But now, you'll be
                       "small" with no dots in the life meter, and the music will turn off (except in 5-1, because the music changes). Grab a
                       Heart, and it will fill in two dots, but you'll still be small! Grab another to fill in the third dot, and to become "big."
                       -- [Found by David Wonn]

                            Fixed in Super Mario All-Stars?: Yes; you can't pause while in a Rocket.
 

                       Trapped
                       When fighting Fryguy, break him down into four "baby" Fryguys. Now try to kill one as you get hit by another at the
                       same time. After you kill off the rest of them, the door won't appear.
                       -- [Sent in by sin@iconnect.net]

                            Fixed in Super Mario All-Stars?: Not sure.
 

                       Illusion items
                       Throw down a Potion on top of some grass. Enter Sub-Space, and press Up to exit. As soon as the door opens, quickly
                       and repeatedly press B. If your timing was right, the item that you pulled out will be on top of your head. You can't throw
                       it, but if you go in a door, or up a vine to a new area, the item will become real and will be sitting in your hands. If you
                       get killed while carrying the illusion item, you'll have a real item in your hands when you retry the stage!
                       -- [Found by Jeff Walker]

                            Fixed in Super Mario All-Stars?: Not sure.
 

                       A chip off the old Rocket
                       Do the "illusion item" trick above, and then go and pull up a Rocket. When it flies upward, your item will stay where it
                       was, and the upper right corner of the Rocket will be gone.
                       -- [Sent in by sin@iconnect.net]

                            Fixed in Super Mario All-Stars?: Not sure.
 

                       POW madness

                            In World 7-1, pick up the POW and go to the end. Jump on an Albatoss and ride it all the way to the left. Throw
                            the POW, and if you pull up the Rocket right away, it will shoot up super fast.
                            Get a POW block and go near logs that are rolling down a waterfall (try World 1-1). Throw the POW Block, and if
                            you are standing on one of the logs when the POW Block hits the ground, the log will go straight up and off the
                            screen.
                            You'll get similar results as the glitch above if the POW block hits the ground while you're standing on a Crystal
                            Ball (try World 1-3), Mushroom (try 3-3 (Sub-Space)), or Turtle Shell (try 1-1).

                                 Fixed in Super Mario All-Stars?: No.
 

                            Throw a POW block, then quickly pull up some vegetable and throw it. The veggie should fly high in the air.
                            Throw a POW block, then quickly pull up a Bob-Omb (try World 5-2). He should drop right through the ground. If
                            you go in a door, die, or otherwise leave the area, you'll experience a delayed Bob-Omb explosion...

                                 Fixed in Super Mario All-Stars?: Yes

                       -- [Found by David Wonn]

                       Warp backwards
                       In World 6-1, get a Potion from the first vase. Take it to the grass between two cacti that yields a Potion. Do the
                       "Illusion item" glitch as explained above, and make sure you get that Potion as the illusion item! Now go into the cave
                       with all those vases. At this point, your illusion Potion should've turned real by entering the cave. Throw it down, and
                       while in Sub-Space, go down one of the vases. You'll warp to 6-1, the same level you were in! (Any vase that cannot
                       normally be entered in Sub-Space turns into a backwards Warp Zone with this glitch.)
                       -- [Found by David Wonn]

                            Fixed in Super Mario All-Stars?: Didn't check yet.
 

                       Disappearing Mushroom Blocks
                       This trick is good to do in World 2-3 after beating Tryclyde, where you'll have a doorway and lots of Mushroom Blocks to
                       work with. Put one or two MBlocks horizontally on top of the door. Pick up another MBlock, and as you're moving, try to
                       throw the MBlock into the bottom corner of one of the MBlocks sitting on the door. If you throw it in the right place, it
                       should go in the exact same spot as one of the MBlocks sitting on the door. The one you threw replaces the one that
                       you threw it into, I guess. This glitch is sorta hard to explain... but once you pull this off, it's easy to duplicate.
                       -- [Found by Deezer]

                            Fixed in Super Mario All-Stars?: Most likely.
 

                       Flashing while climbing a vine
                       On vines that go all the way to the ground, get on or in front of it, and press and hold Down until you start to flash like
                       you're ready for a super jump. Start climbing the vine, and you'll still be flashing as you climb! If you press Left or Right
                       while on the ground you will cease flashing.

                            Fixed in Super Mario All-Stars?: Yes.
 

                       Sub-Space music in the overworld
                       Get Starman and immediately enter Sub-Space. Stay there until your time is up and you're thrown back to the
                       overworld. If you're still invincible when you come out, the Sub-Space music will keep playing over and over.

                            Fixed in Super Mario All-Stars?: Yes.
 

                       Enemy elevator
                       If you throw an enemy, then hit it with another enemy while it's still upside-down, both enemies will shoot straight up.
                       One way to do it is to find a wall or pillar. Hold an enemy while standing on top of another enemy. Press B twice
                       quickly, and if you bounce the first one off the wall you'll have a good chance of pulling off this bug.
                       Another way is to throw a Shyguy into quicksand, then quickly throw another Shyguy onto the one drowning in the
                       quicksand (try World 2-1). I think they stay upside-down longer while drowning in the quicksand, so this might be an
                       easier way to do it.
                       -- [Found by David Wonn]

                            Fixed in Super Mario All-Stars?: Yes.
 

                       Bob-ombs from Mushroom Blocks
                       Find one of those vases covered with a Mushroom Block, that when you take off the MBlock, Bob-ombs come out. Pick
                       up the MBlock and throw it down to the side of the vase leaving a one-block-width gap between the MBlock and the
                       vase. Stand behind the MBlock so the Bob-ombs get stuck between the vase and the MBlock, and eventually they'll
                       blow up the vase. Now take the MBlock and throw it where the vase used to be. Scroll the MBlock off the screen, then
                       scroll back. Bob-oms will be emerging from the Mushroom Block!

                            Fixed in Super Mario All-Stars?: No.
 

                       Put holes in Chains / Change the color of Mushroom Blocks
                       Pick up a Mushroom Block and jump towards a chain. When the chain is directly behind you, throw the MBlock. It
                       should get stuck in the chain and change to a greyish-blue color. If you jump onto the MBlock and pick it up, the
                       MBlock will revert back to its original color, leaving a hole in the chain in the process! Also, once you get on top of the
                       MBlock, you can do the "flashing while climbing" bug on the chain. This also works on Vines and Ladders.

                            Fixed in Super Mario All-Stars?: Yes.
 

                       Floating Mushroom Blocks

                            In doorways created after you beat a boss in any #-3 level, you can throw Mushroom Blocks on top of sunlight
                            emanating through the door.

                                 Fixed in Super Mario All-Stars?: Yes.
 

                            Get at least 2 Mushroom Blocks, and put one in a corner against a wall. Pick up the other one, run towards the
                            wall and jump, and make sure you are still moving towards the wall in mid-air. Right before you touch the wall,
                            throw the Mushroom Block and then try to land on top of the one in the corner. If you did this right, the
                            Mushroom Block you threw should be behind you. Now press B to pick up the MBlock you're standing on, and
                            then jump. The MBlock you threw is now floating in the air! You can do this over and over again until the floating
                            MBlock is too high to jump onto.

                                 Fixed in Super Mario All-Stars?: No.