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Video game storage site Forest of illusion has given Nintendo fans a nice surprise as they have secured a prototype of Super Mario World (US) and not only demoed it but also released it for fans. The prototype is dated October 25, 1990, before the iconic Super Nintendo game hits retail shelves in the United States. Super Mario World (US) features several different dialog, visual changes, and lots of additional debugging features. Since it is a localization prototype, there are many debugging options to play with. For example, you can drive Mario around the map and choose which stage to play, Mario can’t die so you don’t have to worry about 1Ups, and you can choose any power-up you want to use at any time. Here is a video introducing Super Mario World (USA) and you can find more at the link here.

The differences.

  • Yoshi’s house sign has different shadows and letters.
  • The text box font is much thinner than the retail version.
  • Many script differences.
  • Donut Plains 2, Donut Secret House, and Funky match the Japanese version.
  • The stages of Star Trek lead to different stages of testing.
  • Mario will not die after the timer runs out.
  • Various debugging features are enabled.
  • In the staff list, Boo Buddies and Big Boo are called Boo Diddley and Boo Jackson.
  • Font graphics can be found in The Legend of Zelda. From an early version of A Link to the Past.

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