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Sonic in SMB1

Hack of Super Mario Bros.


A character hack of Super Mario Bros. that replaces the famous plumber with the equally-famous (okay, not really) hedgehog. Features drastic changes made to emulate the Genesis Sonic games.

See the readme file for more information.

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



RHDN Hack ImageRHDN Hack ImageRHDN Hack ImageRHDN Hack Image


ContributorType of contributionListed credit
taftqHackingEverything before version 2.0, most of versions 2.0 and 2.5
GlitchyTSPHackingVarious contributions to version 2.0
ThroughT1m3HackingVarious contributions to version 2.5
StudsXHackingCreated the power-up patch used for the hack
KengenOriginal WorkCreated Sonic the Hedgehog in Super Mario Bros., which inspired this hack

User Review Information

A worthy successor.

Reviewed By: Kengen on 31 May 2022

Nice, you’ve actually managed to make Sonic curve into a ball and the sprites looks slightly more detailed, however the running animation looks weird since Sonic doesn’t rotate his head from side to side like in the original games. The original Sonic in SMB1 hack was my very first hack I ever made just for fun and although it was disheartening to see all the negative reviews I’m glad it at least inspired some people to take their own crack at it.

Version 2.5 Recommended - Yes

User Reviews
Fun Little Hack That Could Use Some Visual Tweaksdelta789006 Sep 20222.5Yes
A worthy successor.Kengen31 May 20222.5Yes