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Enhanced Super Mario Bros.

Hack of Super Mario Bros.


Enhanced Super Mario Bros., a ROM hack by Dintonen Inc. (not associated with Nintendo Co., Ltd.)

GitHub repository:

Super Mario Bros., even with its many glitches, was where Mario was born, for a lot of people in the West. But looking back at it now, it looks very basic. The game’s glitches are also everywhere.

That’s why the Enhanced Super Mario Bros. ROM hack project was born. The project aims to fix the game’s many bugs and glitches, even ones that players at the time were not aware of, as well as replace the game’s graphics with newer but still official ones, from the original version of Super Mario Bros.: The Lost Levels.


  • SMB2J graphics
  • European (PAL) version bug fixes and changes (except for changes made to compensate FPS difference)
  • More bug fixes, e.g.:
  • - Minus World bugfix + scroll unlocker fix by Mike Schiraldi, covered by Displaced Gamers (you don’t go to Minus World anymore)
  • - Wrong warp bugfix in 4-2 and 8-4 (sorry speedrunners)
  • - Spiny Egg behavior bugfix (TASes will lose to these Spiny Eggs)
  • - Mushroom jump bugfix

More features coming soon!


Thanks to MrWint and doppelganger for providing the disassembly of Super Mario Bros. If not, this project would not have been possible… without some ROM editing, which is totally not cool. :/

CHR extracted with NesExtract and edited with Tile Layer Pro (graphics) and SMB Title Editor (title screen).

Modified nrom.cfg from nesdoug.

Links to disassemblies, tools and files used:

Glitch sources:

ROM / ISO Information:

  • Database match: Super Mario Bros. (World)
  • Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
  • File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
  • File CRC32: 3337EC46
  • ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7
  • ROM CRC32: D445F698




ContributorType of contributionListed credit
DintonenHackingASM + CHR Modification

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