Editing World-e

{{distinguish2|[[Mario vs. Donkey Kong#Card-e+|e World]] from ''[[Mario vs. Donkey Kong]]'' or [[Orbiting Observatory]] (also known as World E) from ''[[Mario vs. Donkey Kong: Tipping Stars]]}}
[[File:World-e SMA4.gif|frame|World-e]]
'''World-e''' (alternatively '''e-Reader world'''<ref>Peterson, Erik. ''Super Mario Advance 4: Super Mario Bros. 3'' Player's Guide. Page 16. "'''''Getting Started''' Before you connect your e-Reader to the GBA, scroll down and choose Level Card on the Select a File screen. You’ll be warped to e-Reader world.''"</ref> or the '''e-World'''<ref>Hodgson, David S J. ''Super Mario Advance 4: Super Mario Bros. 3'' Prima's Official Strategy Guide. Page 112. "'''''<big>N</big>OTE''' You can slide Demo Cards only in the main game world. You can slide Power-up Cards in both the main game and e-Worlds''{{sic}}''. You can slide Level Cards only in the special area by the castle in the e-World.''"</ref>) is a bonus [[world]], which has an island shaped like a lowercase "e," found only in ''[[Super Mario Advance 4: Super Mario Bros. 3]]''. The world itself is separate from the main adventure, and it can be played at the player's leisure. Although it sports no standard [[level]]s within its vicinity, World-e features a [[Warp Zone]] that can warp [[Mario]] and [[Luigi]] to brand-new levels, provided the player has scanned and loaded the appropriate [[Super Mario Advance 4: Super Mario Bros. 3 e-Reader cards|level cards]] with an [[e-Reader]]. World-e is normally disabled in the European release due to the level cards being unreleased, but it can be accessible via exploiting a save file [[glitch]], revealing it had been fully translated and intact.

Hidden within the new levels are [[Advance Coin]]s. If the player accumulates enough Advance Coins, they will gain access to the three [[Toad House]]s in the area, where they can play [[minigame]]s in exchange for a few of their grand total of [[coin]]s from World-e. However, due to the limited support for the e-Reader outside Japan, non-Japanese players can access fewer levels and only enough Advance Coins to enter the [[Blue Mushroom House]] (a digging minigame). Japanese players can get enough to open the [[Red Mushroom House]] (a ball-throwing minigame) and [[Orange Mushroom House]] (a ''{{wp|Balloon Fight}}''-esque minigame, except going up and with a [[P-Wing]]).

Certain levels have an [[e-Coin]] hidden inside them. e-Coins are usually well hidden and can be collected only once. They are then put on display in the [[e-Coin Castle]]. However, due to the premature cancellation of the e-Reader outside Japan, only three e-Coins can be obtained elsewhere&mdash;the [[Mushroom]], [[Super Leaf]], and [[Super Star|Starman]] e-Coins. Japanese players were able to get the [[Fire Flower]], Mario, Luigi, [[Toad]], and [[Princess Peach]] e-Coins along with the first three.

In all [[Virtual Console]] and [[Game Boy Advance - Nintendo Switch Online]] versions of the game, all levels in World-e are unlocked by default (being present in the European version for the first time), including all of the levels released in Japan. Consequentially, all World-e Toad Houses are also accessible upon the player gaining the necessary Advance Coins.

==Level information==
{|style="text-align: center; width: 100%; margin: 0 auto 10px auto; border-collapse: collapse; font-family:Arial;"border="1"cellpadding="1"cellspacing="1"
|-style="background: #ABC;"
!width="10%"|Level
!width="10%"|Difficulty rating
!Preview
!Summary
|-
|[[Classic World 1-1|★01 Classic World 1-1]]
|★☆☆☆☆
|[[File:W1-1SMA4e.png|256px]]
|A remake of [[World 1-1 (Super Mario Bros.)|World 1-1]] from the original ''[[Super Mario Bros.]]''
|-
|[[Classic World 1-2|★02 Classic World 1-2]]
|★★☆☆☆
|[[File:W1-2SMA4e.png|256px]]
|A remake of [[World 1-2 (Super Mario Bros.)|World 1-2]] from the original ''Super Mario Bros.''
|-
|[[Classic World 1-3|★03 Classic World 1-3]]
|★☆☆☆☆
|[[File:W1-3SMA4e.png|256px]]
|A remake of [[World 1-3 (Super Mario Bros.)|World 1-3]] from the original ''Super Mario Bros.''
|-
|[[Classic World 1-4|★04 Classic World 1-4]]
|★★☆☆☆
|[[File:W1-4SMA4e.png|256px]]
|A remake of [[World 1-4 (Super Mario Bros.)|World 1-4]] from the original ''Super Mario Bros.''
|-
|[[Classic World 2-2|★05 Classic World 2-2]]
|★★☆☆☆
|[[File:W2-2SMA4e.png|256px]]
|A remake of [[World 2-2 (Super Mario Bros.)|World 2-2]] from the original ''Super Mario Bros.''
|-
|[[Wild Ride in the Sky|●01 Wild Ride in the Sky]]
|★★★☆☆
|[[File:Wild Ride in the Sky.png|256px]]
|An auto-scrolling sky level with many moving [[platform]]s.
|-
|[[Slidin%27 the Slopes|●02 Slidin' the Slopes]]
|★★☆☆☆
|[[File:Slidin%27 the Slopes.png|256px]]
|A desert level with great slopes and [[Triangular Block]]s.
|-
|[[Vegetable Volley|●03 Vegetable Volley]]
|★★☆☆☆
|[[File:Vegetable Volley.png|256px]]
|A level with [[grass]] to pull out [[vegetable]]s like in ''[[Super Mario Bros. 2]]'' and a group of [[Chargin' Chuck]]s.
|-
|[[Doors o' Plenty|●04 Doors o' Plenty]]
|★★★★☆
|[[File:Doors o' Plenty.png|256px]]
|A maze-like [[Ghost House]] with many doors and [[Boo]]s with a [[Big Boo]] as the boss.
|-
|[[Bombarded by Bob-ombs|●05 Bombarded by Bob-ombs]]
|★★★★☆
|[[File:Bombarded by Bob-ombs.png|256px]]
|An auto-scrolling [[tank]] level with many Bob-ombs and cannons firing them. [[Boom Boom]] is at the end as the boss.
|-
|[[Magical Note Blocks|●06 Magical Note Blocks]]
|★★★☆☆
|[[File:Magical Note Blocks.png|256px]]
|An upward cave level with [[Note Block|Jump Block]]s forming the way.
|-
|[[The ol' Switcheroo|●07 The ol' Switcheroo]]
|★★★☆☆
|[[File:The ol' Switcheroo.png|256px]]
|An underground tunnel level with coins. The player needs to hit [[P Switch]]es to turn coins into pathways.   
|-
|[[Piped Full of Plants|●08 Piped Full of Plants]]
|★★★★☆
|[[File:Piped Full of Plants.png|256px]]
|A level made of mostly pipes with many Piranha Plants and [[Fire Piranha Plant]]s.
|-
|[[Swinging Bars of Doom|●09 Swinging Bars of Doom]]
|★★★★☆
|[[File:Swinging Bars of Doom.png|256px]]
|A castle level with [[Fire Bar|Fire-Bar]]s. Two [[Boom Boom]]s are at the end as bosses.
|-
|[[Para Beetle Challenge|●10 Para Beetle Challenge]]
|★★★★★
|[[File:Para Beetle Challenge.png|256px]]
|An auto-scrolling sky level with many [[Para-Beetle]]s acting as platforms.
|-
|[[A Musical Trek|●11 A Musical Trek]]
|★★★☆☆
|[[File:SMA4 A Musical Trek Screenshot.png|256px]]
|A sky level with many [[Note Block|Jump Block]]s forming the way.
|-
|[[Armored Airship|●12 Armored Airship]]
|★★☆☆☆
|[[File:SMA4 Armored Airship.png|256px]]
|An auto-scrolling airship level with [[Lemmy Koopa]] as the boss.
|-
|[[Ice Dungeon|●13 Ice Dungeon]]
|★★★★☆
|[[File:SMA4 Ice Dungeon Level Screenshot.png|256px]]
|A level consisting of an underground cave segment and several aboveground ice-themed segments.
|-
|[[A Sky-High Adventure|●14 A Sky-High Adventure]]
|★★★☆☆
|[[File:SMA4 A Sky-High Adventure Screenshot.png|256px]]
|A short level with an optional maze of doors and rooms requiring the abilities of the [[Tanooki Suit]].
|-
|[[Sea to Sky|●15 Sea to Sky]]
|★★☆☆☆
|[[File:SMA4 Sea to Sky Screenshot.png|256px]]
|A level with seaside and underwater segments and a final sky segment requiring the [[Cape Feather]]'s flying ability. 
|-
|[[It's a Shoe-In|●16 It's a Shoe-In]]
|★★★☆☆
|[[File:SMA4 It's a Shoe-In Screenshot.png|256px]]
|A castle level with many obstacles requiring the [[Goomba's Shoe]].
|-
|[[Slip Slidin' Away (Super Mario Advance 4: Super Mario Bros. 3)|●17 Slip Slidin' Away]]
|★★★★☆
|[[File:SMA4 Slip Slidin' Away Screenshot.png|256px]]
|An ice-themed level with many [[Stretch Block]]s and [[Bumpty|Bumpties]], with a back-and-forth auto-scrolling segment near the end.
|-
|[[Ice Cubed|●18 Ice Cubed]]
|★★★★☆
|[[File:SMA4 Ice Cubed Screenshot.png|256px]]
|An ice block fortress with many [[Frozen Coin|frozen coins]] and two [[Boom Boom]]s as bosses.
|-
|[[Puzzling Pipe Maze|●19 Puzzling Pipe Maze]]
|★★★☆☆
|[[File:SMA4 Puzzling Pipe Maze Screenshot.png|256px]]
|A desert level with a large pipe maze. 
|-
|[[A Towering Tour|●20 A Towering Tour]]
|★★★☆☆
|[[File:SMA4_A_Towering_Tour_Screenshot.png|256px]]
|A level consisting of a sky segment with [[Snake Block]]s and a descending tower segment.
|-
|[[Castle Dash|●21 Castle Dash]]
|★★★★★
|[[File:Escape The Castle!!.png|256px]]
|A castle level with a short [[Time Limit|time limit]], requiring the playing to dash through lots of obstacles.
|-
|[[Rich with Ropes|●22 Rich with Ropes]]
|★★☆☆☆
|[[File:RopeClimbingAthletic.png|256px]]
|A desert level with many ropes and [[Hoopster]]s on them.
|-
|[[Vexing Doors|●23 Vexing Doors]]
|★★★★☆
|[[File:SMA4 World e-23 Screenshot.png|256px]]
|A Ghost House level with a maze of doors, [[Snake Block]]s, and [[P Switch]]es. A [[Big Boo]] is at the end as the boss.
|-
|[[Caped Escape|●24 Caped Escape]]
|★★★☆☆
|[[File:ClearSkies.png|256px]]
|A sky level requiring the [[Cape Feather]]'s flying ability.
|-
|[[Ground Work|●25 Ground Work]]
|★★★☆☆
|[[File:SMA4 Ground Work Screenshot.png|256px]]
|A desert level with lots of [[soft sand]] to dig through.
|-
|[[An Aqueous Adventure|●26 An Aqueous Adventure]]
|★★★★☆
|[[File:An Aqueous Adventure screenshot.png|256px]]
|An underwater level with many [[Fire Bar|Fire-Bar]]s and [[Rotary Lift]]s.
|-
|[[Bowser's Last Stand|●27 Bowser's Last Stand]]
|★★★★★
|[[File:SMA4 Bowser's Last Stand Screenshot.png|256px]]
|A longer take on Bowser's Castle with Bowser as the boss.
|-
|[[Koopaling Confusion|●28 Koopaling Confusion]]
|★★★☆☆
|[[File:SMA4 Koopaling Confusion Screenshot.png|256px]]
|An auto-scrolling battleship level with [[Ludwig von Koopa]] as the boss.
|-
|[[Bowser's Airship 1|●29 Bowser's Airship 1]]
|★★★★☆
|[[File:SMA4 Bowser's Airship 1 Screenshot.png|256px]]
|The first part of an auto-scrolling airship level with [[Boom Boom]] as the boss.
|-
|[[Bowser's Airship 2|●30 Bowser's Airship 2]]
|★★★★★
|[[File:SMA4 Bowser's Airship 2 Screenshot.png|256px]]
|The second part of an auto-scrolling airship level with Bowser as the boss.
|-
|[[Airship's Revenge|PR Airship's Revenge]]
|★★★☆☆
|[[File:Airship's Revenge.png|256px]]
|An auto-scrolling airship level with [[Morton Koopa Jr.]] as the boss.
|-
|[[No Time to Dawdle|PR No Time to Dawdle]]
|★★★★★
|[[File:SMA4 No Time to Dawdle.png|256px]]
|Another level with a very short time limit, requiring the player to rush through the course.
|-
|[[Treacherous Halls|PR Treacherous Halls]]
|★★★★★
|[[File:Challenge!! Togetoge.png|256px]]
|A castle level with many spiked floors, requiring the player to stomp on enemies to cross them. A Boom Boom is fought here.
|}

==Names in other languages==
{{Foreign names
|Jap=WORLDe+<br>(Early release version)<br>ワールドe+<br>(Late-shipping version,<br>[[Virtual Console]] version,<br>[[Game Boy Advance - Nintendo Switch Online]] version)
|JapR=Wārudo Ī Purasu
|JapM=World e plus
|Spa=Mundo-e
|SpaM=World-e
|Fre=Monde-e
|FreM=World-e
|Ger=e-Welt
|GerM=e-World
|Ita=Mondo-e
|ItaM=World-e
}}

==References==
<references/>

{{SMB3}}
{{SMB3 levels}}
[[Category:Super Mario Bros. 3 worlds]]