During the release of Super Mario Bros 3, Nintendo accidentally left several unused stages in the game that were not initially accessible without modifying the game. These "lost levels" were eventually discovered by hackers, and in this video, I will take you through the top 15 of them.

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Game Genie Codes to access lost levels:
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#Nintendo #SuperMario #NES #retrogaming #supermariobros #retrogames #retro #mariobros