is a fan-made modification (ROM hack) for the classic Nintendo 64 title, Super Mario 64 . The "V2.2.2" in its name indicates it's an iterative update, refined over time to polish the experience and fix issues, showcasing the project's ongoing development within the dedicated fan community. While the core level design and structure of Mario's world remain, the hack completely re-works the game's protagonist, physics, and atmosphere to be centered around Sonic the Hedgehog .

. While the original "Sonic Edition" focused on making Sonic playable in the vanilla game, the version (often associated with versioning like

Mario’s ground pound is replaced by the Sonic Adventure 2 style Bound Jump, allowing for high vertical bounces.