Super Mario Bros.: The Lost Levels

Super Mario Bros.: The Lost Levels (, Super Mario Bros. 2) is the second installment of the series, released in 1986 only in Japan and later brought into international market in several remakes and rereleases. It features mostly the same gameplay of its predecessor, but is overall harder. Its numerical place was taken internationally by a different Super Mario Bros. 2.

It is available by default as a Masterpiece in Super Smash Bros. for Wii U.

Characters
While Luigi appeared in previous games, he was just a simple palette swap of Mario. Super Mario Bros.: The Lost Levels was the first game to introduce his trademark physics differences, a higher jump and less agility, which carried over to his appearance in Super Smash Bros..

Items
The Poison Mushroom debuted in this game. Its appearance was very similar to the Super Mushroom but with darker colors, much like in the Super Smash Bros. series.

Music
The track "Super Mario Bros.: The Lost Levels Medley" is one of the default choices in Mushroom Kingdom U. However, despite its title, all the tracks part of the medley originated in the prior Super Mario Bros..

Miscellaneous
Bowser's eigth alternate costume in Super Smash Bros. for Nintendo 3DS and Wii U is based on a in this game.