Editing World 1-2 (Super Mario Bros.)

{{italic title|id=yes}}
{{level infobox
|image=[[File:FireMarioSMB.png]]
|code=1-2
|world=[[World 1 (Super Mario Bros.)|World 1]]
|game=''[[Super Mario Bros.]]''
|limit=400 seconds
|before_alt=
|before=[[World 1-1 (Super Mario Bros.)|<<]]
|after=[[World 1-3 (Super Mario Bros.)|>>]] [[World 2-1 (Super Mario Bros.)|<sup>>></sup>]] [[World 3-1 (Super Mario Bros.)|<sup>>></sup>]] [[World 4-1 (Super Mario Bros.)|<sup>>></sup>]] [[World 5-1 (Super Mario Bros.)|**]] [[Minus World|**]]
|secret=
}}
'''World 1-2''' is the second course of [[World 1 (Super Mario Bros.)|World 1]] in ''[[Super Mario Bros.]]'' and the second level overall in said game. It is the first underground level, and thus set the precedent for most 2D games of the [[Super Mario (franchise)|''Super Mario'' franchise]] to have the second level be an underground level. It also holds the first [[Warp Zone]], which, if accessed by walking through the wall, can be used to enter the [[Minus World]].

==Layout==
The player starts the level by falling through a hole in the roof by a [[Warp Pipe|pipe]]s. There will be two [[Goomba|Little Goomba]]s and five [[? Block]]s. The first one contains a [[Super Mushroom|Magic Mushroom]] or [[Fire Flower]], the other four ones contain [[coin]]s. There will be a block tower structure, where there is a Little Goomba and a [[Brick Block]] with 10 coins. Ahead, there will be some Brick Blocks, one of them containing a [[Super Star|Starman]] and some coins, with two [[Koopa Troopa]]s underneath them. The player will reach a place filled with Brick Blocks with a Koopa Troopa and five Little Goombas. By breaking the Brick Blocks, the player can reach and walk across the top of the level. There will also be a Brick Block with a [[Super Mushroom|Magic Mushroom]] or [[Fire Flower]] and a masked Brick Block with ten coins. There will be a [[pit]] and, after it, a Block platform that allows the player to get a [[1-Up Mushroom|1 up Mushroom]]. The player will find two Little Goombas and three pipes, all of them containing [[Piranha Plant]]s. The player can enter in the first Pipe, that will lead them to a room with 27 coins and a 10-Coin Brick Block. The player can exit the area by a Warp Pipe to the very right. This pipe will lead to the third one in the main area. There will be two gaps and, between them, two ground blocks and some Brick Blocks. After that, a small, half-pyramid structure with two Little Goombas is seen. Ahead, some [[lift]]s will be rising and falling; the first one moves down while the right one moves up. Between them is a platform with a Koopa Troopa and some Brick Blocks, with the final Brick Block on the right containing a power-up. The player will reach a Pipe that will lead them to the final area. They can use the lifts to reach a [[Warp Zone]] hidden through the roof. From right to left, the first pipe will head to [[World 2 (Super Mario Bros.)|World 2]], the second one will lead to [[World 3 (Super Mario Bros.)|World 3]], and the third one will lead to [[World 4 (Super Mario Bros.)|World 4]]. However, this also allows the player to access the infamous Minus World if they manage to go through the wall instead. If the player goes through the regular level pipe, they will lead the player to a pipe with a Piranha Plant in an overworld area. There will be a staircase made out of [[Hard Block]]s that allows the player to jump on the top of the [[Goal Pole|flagpole]].

===Challenges===
[[File:SMBDX_Red_Coin_Snapshot.png|thumb|The second [[Red Coin]] in the Challenge mode of ''Super Mario Bros. Deluxe''.]]
In ''[[Super Mario Bros. Deluxe]]'', the player can collect five [[Red Coin]]s, find a hidden [[Yoshi's Egg|Yoshi Egg]], and get a medal based on their score. The Yoshi Egg is found in a [[Hidden Block]] at the very end of the underground area above the exit pipe, and the score to beat is 38000 (26000 in the Japanese version<ref>[[tcrf:Super_Mario_Bros._Deluxe#Challenge_Mode|''Super Mario Bros. Deluxe'' regional differences on The Cutting Room Floor]]</ref>). The Red Coin locations are:
*In the last block to the right in the row of ? Blocks at the start
*With the other coins above the [[Brick Block]] formation near the start of the level
*On top of the large pillar of Brick Blocks with the hidden 10-Coin Block, just after the second power-up
*In the 10-Coin block in the secret area through the Warp Pipe, which the player needs to collect all the coins from in order for the Red Coin to appear.
*Directly above the stone stairs before the downward-moving lifts

The Warp Zone area at the end has been replaced. It instead contains several Brick Blocks, three ? Blocks, 22 coins, and a power-up in a Brick Block before the pipe that out the same exit as the regular pipe.

==Enemies==
{{number of enemies
|image1=[[File:SMB Goomba Sprite.gif]]
|name1=[[Goomba|Little Goomba]]
|count1=14
|image2=[[File:Green Koopa Troopa SMB.gif]]
|name2=[[Koopa Troopa]] (green)
|count2=3
|image3=[[File:SMB Red Koopa Troopa.gif]]
|name3=Koopa Troopa (red)
|count3=1
|image4=[[File:PiranhaPlant SMB Sprite.gif]]
|name4=[[Piranha Plant|Piranha plant]]
|count4=4
}}

==Items==
{{Item locations
|image1=[[File:SMBCoin.gif]]
|name1=[[Coin]]
|count1=68 (90 in ''Super Mario Bros. Deluxe''{{'}}s challenge mode)
|notes1=4 in ? blocks, up to 30 across three [[Coin Block]]s, and 34 in open air, 17 of which are in the secret area. An additional 22 coins are located in the secret area exclusive to ''Super Mario Bros Deluxe''{{'}}s challenge mode, 9 of which are in open air, three are located in ? blocks, and up to 10 can be found in one [[Coin Block]].
|image2=[[File:SMB Supermushroom.png]][[File:Fire Flower SMB.gif]]
|name2=[[Super Mushroom|Magic Mushroom]]/[[Fire Flower]]
|count2=3 (4 in ''Super Mario Bros. Deluxe''{{'}}s challenge mode)
|notes2=
|image3=[[File:Starman.gif]]
|name3=[[Super Star|Starman]]
|count3=1
|notes3=Hidden in a [[Brick Block]].
|image4=[[File:SMB 1-up Mushroom Sprite.png]]
|name4=[[1-Up Mushroom|1 up Mushroom]]
|count4=1
|notes4=Hidden in a [[Brick Block]] that is a part of the ceiling, above the rightmost edge of the rectangle of Brick Blocks with six coins above it.
}}

==Level map==
{{Wide image|SMB NES World 1-2 Map.png|4096|Map of World 1-2}}

==Recreations in later media==
This list does not include World 1-2's reappearances in remakes, ports, and other reissues of ''Super Mario Bros.''

{{appearances list
|title1=''[[Super Mario Advance 4: Super Mario Bros. 3]]''
|role1=Recreated in the form of [[Classic World 1-2]]
|release1=2003
|format1=[[Game Boy Advance]]
|title2=''[[Super Paper Mario]]''
|role2=In the underground portion of [[The Bitlands]]
|release2=2007
|format2=[[Wii]]
|title3=''[[Super Smash Bros. Brawl]]''
|role3=An alternate version of [[Mushroomy Kingdom]].
|release3=2008
|format3=Wii
|title4=''[[New Super Mario Bros. 2]]''
|role4=Part of the [[First Course (Gold Classics Pack)|first course]] of the [[Gold Classics Pack]]
|release4=2012
|format4=[[Nintendo 3DS]]
}}

==Gallery==
<gallery widths=180>
SMB Planning W1-2.jpg|Concept art
SMB-World1-2-UndergroundJump.png|The area with many Brick Blocks
SMB W1-2 Piranha Plants.png|Mario encounters Piranha Plants midway through the level 
SMB Warpzone.png|The secret Warp Zone
SMAS SMB Warp Zone.png|The secret Warp Zone in ''Super Mario All-Stars''
SMBDX Warp Zone.png|The secret Warp Zone in ''Super Mario Bros. Deluxe''
SMBDX World1-2ChallengeWarpZone.png|The changed Warp Zone area in Challenges mode of ''Super Mario Bros. Deluxe''
</gallery>

==Trivia==
[[File:TDS World 1-2 Koopa Troopa.png|thumb|Cameo in ''Tetris DS'']]
*In ''[[Tetris DS]]'', World 1-2 cameos as the background stage for levels 3 and 7 in Marathon mode, while its bonus area appears on the touch screen in the former.
*In ''[[Mario Kart 8]]'' and ''[[Mario Kart 8 Deluxe]]'', there is {{file link|MK8 dSBS Graffiti.png|graffiti}} on the wall in [[Super Bell Subway]] that references World 1-2.
*In ''[[Super Paper Mario]]'', [[Chapter 3-1]]'s underground portion can be distinguished as a replica of World 1-2 due to its layout.
*In ''[[Super Mario Bros. Deluxe]]'', one of the VS Game levels that is also called [[World 1-2 (VS Game)|World 1-2]], contains a fake version of World 1-2's Warp Zone. Jumping onto the roof above the "normal" exit pipe is required to get further into the level, and players can choose to either jump above the dropdown point and continue running to the right; or to drop down, make a left jump above the pipe of where the warp to World 3 would have been (and whose Piranha Plant has not despawned), and then down to a bottom floor tunnel heading right.

==References==
<references/>

{{SMB levels}}
[[Category:Underground areas]]
[[Category:Super Mario Bros. levels]]
[[it:Mondo 1-2 (Super Mario Bros.)]]