. . "The prototype version of Super Mario Bros. 2 is, as the name states, the prototype version of Super Mario Bros. 2. It contains quite a lot of differences."@en . . . "The prototype version of Super Mario Bros. 2 is, as the name states, the prototype version of Super Mario Bros. 2. It contains quite a lot of differences."@en . . "Prototype"@en . "Final"@en . . . . . . . "Super Mario Bros. 2 (prototype)"@en . . . . . . . . .