Editing Subspace

'''Subspace''',<ref>{{cite|language=en-us|title=''Super Mario Advance'' instruction booklet|page=29|publisher=Nintendo of America|author=Nintendo|date=2001}}</ref> alternatively spelled '''Sub-space'''<ref>{{cite|date=1993|title=''Super Mario All-Stars'' Player's Guide|page=87-88|publisher=Nintendo of America}}</ref><ref>{{cite|date=1988|publisher=Nintendo of America|language=en-us|author=Nintendo|title=''Super Mario Bros. 2'' instruction booklet|page=19 and 20}}</ref><ref>{{cite|date=July/August 1988|title=''Nintendo Power'' Volume 1|page=10|publisher=Nintendo of America|language=en-us}}</ref> or '''Sub-Space''',<ref>{{cite|date=September/October 1988|title=''Nintendo Power'' Volume 2|page=43|publisher=Nintendo of America|language=en-us}}</ref><ref>{{cite|date=Spring 1991|title=''NES Game Atlas''|page=13, 16, and 21|language=en-us|publisher=Nintendo of America}}</ref> also known as the '''Hidden World''',<ref>{{cite|title=''Super Mario Bros. 2 Inside Out'', Part I|page=6|publisher=[[Nintendo Power]]|language=en-us|date=1989}}</ref> and misspelled as '''Sup-Space''' on one occasion,<ref>{{cite|date=Spring 1991|title=''NES Game Atlas''|page=18|language=en-us|publisher=Nintendo of America}}</ref> is an alternate dimension to [[Subcon]] in ''[[Super Mario Bros. 2]]''. It features dark terrain mirrored on a single screen, which the player cannot travel beyond. Subspace can only be accessed by entering a door from a [[Magical Potion]]. The player character can be in Subspace for a few seconds only, after which they are taken back into the main level. A [[Mushroom]] may appear in Subspace to be collected, depending on where the player character has entered from. All items found in any available red [[grass]] are transformed into [[coin]]s when the player plucks them, though for the first two visits only, and any still-standing grass tufts give unripe [[vegetable]]s afterwards. Depending on the area, players can also collect [[Cherry|cherries]], [[Super Star|Starmen]], and [[POW Block|POW]]s. Cherries and POWs do not vanish upon returning to the main level. Within this zone, a few [[jar]]s contain a '''Subspace Warp'''<ref>{{cite|auhthor=Farkas, Bart G|title=''Super Mario Advance'' Official Pocket Guide|page=105|language=en-us|publisher=Bradygames|date=June 13, 2001|isbn=0-7440-0077-7}}</ref> that can be entered for the player character to instantly skip over to a later world, similarly to a [[Warp Zone]] in ''[[Super Mario Bros.]]''

In the game's [[Super Mario All-Stars|two]] [[Super Mario Advance|remakes]], the background is the same, but the level terrain is colored-in, rather than black. In ''Super Mario Advance'' only, [[Yoshi's Egg|Yoshi Egg]]s are hidden in Subspace after [[Wart]] is defeated.

In ''[[BS Super Mario USA]]'', entering any jar in Subspace sends the player directly to [[Wart]]'s chamber. There are no enemies, but [[Phanto]] can follow the player into Subspace if they were holding the [[key]]. The player can still die by falling into a [[pit]] or drowning in [[quicksand]], but this will allow another chance for obtaining coins.

|Jap={{hover|裏画面|うらがめん}}<ref>{{cite|language=ja|date=1987|publisher=Nintendo|author=Nintendo|title=''Yume Kōjō: Doki Doki Panic'' instruction booklet|page=21 and 26}}</ref>

|Ger=Unterwelt<ref>{{cite|title=''Super Mario Advance'' instruction booklet|page=31|language=de|date=2001|publisher=Nintendo of Europe|author=Nintendo}}</ref>

|Ita2=Zona d'ombra <small>(''The Super Mario Bros. Super Show!'')</small>

|Spa=Subespacio<ref>{{cite|title=''Super Mario Advance'' instruction booklet|page=91|language=es-es|date=2001|publisher=Nintendo of Europe|author=Nintendo}}</ref>

|Fre=Sous-espace<ref>{{cite|title=''Super Mario Bros. 2'' instruction booklet|page=21|language=fr|publisher=Nintendo}}}}</ref><ref>{{cite|title=''Super Mario All-Stars'' instruction booklet|page=21|language=fr|publisher=Nintendo}}</ref>

|Fre2=Subspace<ref>{{cite|title=''Super Mario Advance'' instruction booklet|page=51|language=fr|date=2001|publisher=Nintendo of Europe|author=Nintendo}}</ref>

*With the exception of the original ''[[Yume Kōjō: Doki Doki Panic]]'', the music playing here is an arrangement of the [[Ground Theme (Super Mario Bros.)|overworld theme]] from ''[[Super Mario Bros.]]''