Hi,
While many of you familiar with the Super Mario Bros. Minus World level know it to be a never-ending version of World 2-2, the Japanese version (if you're referring to the Famicom Disk System port) is different:
The F.D.S. port instead has these levels making up the Minus World:
World -1 is World 1-3 with underwater graphics
World -2 is the same as World 7-3
World -3 is World 4-4 with dungeon graphics
While many of you familiar with the Super Mario Bros. Minus World level know it to be a never-ending version of World 2-2, the Japanese version (if you're referring to the Famicom Disk System port) is different:
The F.D.S. port instead has these levels making up the Minus World:
World -1 is World 1-3 with underwater graphics
World -2 is the same as World 7-3
World -3 is World 4-4 with dungeon graphics