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So, as any Mario fan is bound to know, Super Mario Bros. 2 as the USA knows is a copy of another game called Doki Doki Panic. The real SMB2, released only in Japan, is actually much like the first game. However, at the time, sequels were not a common thing with video games, and Nintendo of Japan thought "second game = harder game".
When Nintendo of America got a hold of this game, they deemed it too difficult and too much like the original to sell well. Therefore, they scrapped the game and copied Doki Doki Panic, giving America what we know today as Super Mario Bros. 2.
However, what if Nintendo of America had the same mindset as their Japanese counterparts and allowed the actual sequel to be released in America? Would it tank as predicted? How would this effect the future of the Mario series, as well as the future of Nintendo in general?