Screenshot of gameplay from the 1986 Japanese release, showing a poison mushroom It is remembered among the most difficult Nintendo games. The Lost Levels was the most popular game on the Disk System, for which it sold about 2.5 million copies.

This sequel gave Luigi his first character traits and introduced the poison mushroom item, which has since been used throughout the Mario franchise. Journalists appreciated the game's challenge when spectating speedruns, and recognized the game as a precursor to the franchise's subculture in which fans create and share ROM hacks featuring nearly impossible levels. Reviewers viewed The Lost Levels as an extension of the original game, especially its difficulty progression. It was later ported to the Game Boy Color, Game Boy Advance, Virtual Console ( Wii, Nintendo 3DS, and Wii U), and Nintendo Switch. The game was renamed The Lost Levels and first released internationally in the 1993 Super Nintendo Entertainment System compilation Super Mario All-Stars. 2: a retrofitted version of the Japanese Doki Doki Panic. Nintendo of America deemed it too difficult for its North American audience and instead chose another game as the region's Super Mario Bros. It was developed by Nintendo R&D4-the team led by Mario creator Shigeru Miyamoto-and designed for players who had mastered the original. 2 on June 3, 1986, following the success of its predecessor. The Lost Levels was released in Japan for the Famicom Disk System as Super Mario Bros. The game has 32 levels across eight worlds and 20 bonus levels. The Lost Levels also introduces obstacles such as poison mushroom power-ups, counterproductive level warps, and mid-air wind gusts. The Lost Levels adds a greater level of difficulty and Luigi controls slightly differently from Mario, with reduced ground friction and increased jump height. The games are similar in style and gameplay, with players controlling Mario or Luigi to rescue the Princess from Bowser. Super Mario Bros.: The Lost Levels is a 1986 platform game developed and published by Nintendo as the sequel to Super Mario Bros.

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