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Contributed by game4brains
The Famicom Disk System version of Super Mario Bros. also contains World 0-1 but it is a full-fledged world with complete programming.
• 0-1 is a differently-textured version of 1-3, though it takes place underwater (even though there is no visible water and features bizarre elements, such as floating Princess Toadstools and floating, headless Bowsers).
• 0-2 is a carbon copy of 7-3.
• 0-3 is a copy of 4-4 that lacks its False Bowser and maze-like elements, features a different color palate (i.e. blue lava), and floating bloopers that can be stomped for 1000 points.
After beating 0-3, the player is taken back to the title screen (with the activation of hard mode upon starting the game), as if they had beaten the game.
• 0-1 is a differently-textured version of 1-3, though it takes place underwater (even though there is no visible water and features bizarre elements, such as floating Princess Toadstools and floating, headless Bowsers).
• 0-2 is a carbon copy of 7-3.
• 0-3 is a copy of 4-4 that lacks its False Bowser and maze-like elements, features a different color palate (i.e. blue lava), and floating bloopers that can be stomped for 1000 points.
After beating 0-3, the player is taken back to the title screen (with the activation of hard mode upon starting the game), as if they had beaten the game.
Contributed by GutsehMan
If you look closely at the cover art, you'll see that Mario is about to die, as shown by the lava below him, and the wall in front of him.
Contributed by TrevMaster3000
The World 0-1, or Minus World glitch (in which Mario can visit a secret world before World 1, and entering the pipe at the end of it returns him to the beginning of the World), is fairly well known but there are actually two more worlds after it that can be accessed by hacking a flag pole into the level.
Level 0-2 is just another water level with a lot of unfinished level design and acts as one of Bowser's castles.
Level 0-3 is a land level with the flooring as a ceiling which you can break like normal blocks. This level also has enemies unlike 0-2 and ends just like a castle too.
Level 0-4 is a level that doesn't exist so the game just takes you to a black screen.
Level 0-2 is just another water level with a lot of unfinished level design and acts as one of Bowser's castles.
Level 0-3 is a land level with the flooring as a ceiling which you can break like normal blocks. This level also has enemies unlike 0-2 and ends just like a castle too.
Level 0-4 is a level that doesn't exist so the game just takes you to a black screen.
Contributed by KnowledgeBase
Using a glitch involving a Koopa Troopa, it is possible to jump over the flag at the end of any level and continue to walk on endlessly. In world 3-3 specifically, you can easily jump over the flagpole without the exploit.
Contributed by oskachu
A special edition of Super Mario Bros., entitled "All Night Nippon Super Mario Bros." was released only in Japan. It featured almost identical gameplay to "Super Mario Bros. The Lost Levels", but instead replaced the enemies with Japanese celebrities. It was based on the popular Japanese radio program, "All Night Nippon", and was given away as a raffle prize from the program itself.
Contributed by Mario-Fan
If you find a Hammer Bro and wait for a while, it will eventually start chasing you.
Contributed by beat_that_potato
Nobody knows exactly when the game was released in North America.
Contributed by pyoro64
The bowsers in the castles of world 1 through 7 are just common enemies disguised as him. You can reveal the disguise by killing the false bowser with fireballs.
Contributed by Silver964
Super Mario Bros. was originally planned to be a shooting game. According to Shigeru Miyamoto, Mario's fireballs were going to be bullets, and he could fly on a cloud shooting at enemies.
