Super Mario in Sonic the Hedgehog 1 is a ROM hack that integrates the iconic Super Mario into the world of Sonic the Hedgehog. This unique combination blends two popular game franchises, potentially altering the level design, adding new characters, and transforming the overall gameplay. While the base is Sega's original Sonic, this hack showcases how creative fans reimagine existing games. This is a fan-made ROM hack and not officially supported by Sega or Nintendo.

Super Mario in Sonic the Hedgehog 1 

Super League (Japan)