Editing Mushroom Kingdom II

|image        = {{tabber|title1=Ultimate|content1=[[File:SSBU-Mushroom Kingdom II.png|300px]]<br>[[File:MarioSymbol.svg|50px|class=invert-dark]]|title2=Melee|content2=[[File:MKII-NRML-SSBM.png|300px]]<br>[[File:MarioSymbol(preBrawl).svg|50px|class=invert-dark]]}}

|caption      = Mushroom Kingdom II across the series.

In ''Melee'', [[Star KO]]'d characters will [https://www.youtube.com/watch?v=EU0p2IpoV1A fade before turning into a star.] Star KOs cannot occur at all in ''Ultimate'', as with most other stages with 2D backdrops.

Contrary to this stage's name, it is not based on any location in the {{b|Mushroom Kingdom|location}}. This stage is based on the overworld sections of {{iw|mariowiki|World 1|Super Mario Bros. 2}} in ''[[Super Mario Bros. 2]]'', with its graphical style based on the SNES remaster of ''Super Mario Bros. 2'' included in ''{{s|mariowiki|Super Mario All-Stars}}'' instead of the original NES version; the saturated colors in the ''Melee'' version particularly resemble ''{{s|mariowiki|Super Mario Advance}}'', the GBA port of the ''All-Stars'' remaster of the game.

In ''Super Mario Bros. 2'', [[Mario]], [[Luigi]], [[Princess Peach]], and [[Toad]] enter the dream world of {{s|mariowiki|Subcon}}, which was taken over by the game's main villain, {{iw|mariowiki|Wart}}. The door they entered through leads to the game's [[mariowiki: World 1-1 (Super Mario Bros. 2)|first level]], which takes place on a grassy terrain. World 1-1 features waterfalls with logs flowing over, which act as temporary platforms; {{s|mariowiki|beanstalk}}s, which functions similarly as ladders; and {{s|mariowiki|jar}}s, which functions similarly to the {{uv|Mario}} series' [[Warp Pipe]]s. The players can pluck tufts of [[grass]], which can spawn an item when pulled from the ground, and collect five [[mariowiki:Cherry|cherries]] in each level, which will spawn a [[Super Star]].

This stage features multiple elements from the overworld levels in World 1 in ''Super Mario Bros. 2'', albeit with some visual differences between their appearances in ''Super Smash Bros. Melee'' and ''Ultimate''. The 16-bit sprites used in this stage (e.g. the Pidgit's magic carpet, the logs, etc.) in ''Melee'' are enhanced to use their original 16-bit sprites from ''Super Mario All-Stars''. The grassy platforms, a single jar, two beanstalks, and five cherries appear as background elements, while the grass appears as a foreground element on the stage, though they cannot be interacted with.

*This is one of the five stages in the ''Super Smash Bros.'' series to change music when the [[Match timer|timer]] reaches 20 seconds (30 seconds in ''Ultimate'') and during [[Sudden Death]], the others are [[Mushroom Kingdom (SSB)]], [[Mushroom Kingdom (SSBM)]], [[Suzaku Castle]] (if the music played is any type of one of the sixteen playable characters in ''Street Fighter II'' and ''Super Street Fighter II'') and [[Moray Towers]].