Sonic X is a hack of Super Mario Bros. 3 by QAZ Company, with Mario replaced with Sonic and the music replaced with other music, mostly from Mappy, DuckTales and MOTHER.

Music Edit

- the world maps are all the Mappy theme - Overworld 1 is Bein' Friends from MOTHER - Overworld 2 is the Amazon from DuckTales - Underwater is the Moon from Ducktales - Underworld is the intro theme from Mr. Gimmick - Starman theme is the Mappy bonus theme - Fortress is the final boss theme from MOTHER - Airship is Transylvania from DuckTales - Koopa Kid Battle is the title theme from Chip N Dale Rescue Rangers - Bowser Battle is Jib Jig from the bootleg DKC 2.