Super Mario World, also known as Super Mario Advance, is an unlicensed Sega Mega Drive game developed by Chuanpu (it's unknown as to whether the publisher was Ming Super Chip Electronic), loosely based off Nintendo's Super Mario Bros. franchise. It is actually a hack of Squirrel King, another unlicensed game. Whereas the first few stages have been altered (with tiles taken from Super Mario All-Stars on the SNES), later stages are identical to those seen in Squirrel King.