Editing Koopa Troopa Cave

{{level infobox
|image=[[File:Super-Mario-3D-World-1-2.jpg|250px]]
|code=World 1-2
|world=[[World 1 (Super Mario 3D World)|World 1]]
|game=''[[Super Mario 3D World]]''<br>''[[Super Mario 3D World + Bowser's Fury]]''
|limit=500 seconds
|before_alt=
|before=[[Super Bell Hill|<<]]
|after=[[Chargin' Chuck Blockade|>>]]
|secret=[[Conkdor Canyon|**]]
|track=Super Bell Hill<br>Underground Theme
|sample=Start/End:[[File:SM3DW Super Bell Hill.oga]]<br>Underground section:[[File:SM3DW Underground Theme.oga]]
}}
'''Koopa Troopa Cave''', otherwise known as '''World 1-2''', is the second standard course of [[World 1 (Super Mario 3D World)|World 1]] in ''[[Super Mario 3D World]]'' and its [[Nintendo Switch]] port ''[[Super Mario 3D World + Bowser's Fury]]''. The course takes place in an underground cave with [[Koopa Troopa]]s, [[Goomba]]s, and [[Clear Pipe]]s, and it is unlocked by beating [[Super Bell Hill]], and its completion unlocks [[Chargin' Chuck Blockade]] and a [[Toad House]].

Koopa Troopa Cave additionally appears in the background in ''[[Super Mario Maker 2]]'', in the underground theme of the ''Super Mario 3D World'' style.
==Layout==
The course starts on a grassy hill with a Koopa Troopa and a [[Warp Pipe]] nearby, which leads to an underground cavern filled with Koopas and Goombas. Near the beginning of this cave is a [[Clear Pipe]] that leads to a section with a Koopa Troopa and a [[? Block]]. To the right is an area with some pipes and a hidden [[1-Up Mushroom]]. Following this is an area full of cloudy platforms; at the top is a straightaway, and a Clear Pipe that leads to an area with three openings. One contains a golden Warp Pipe that has three [[Gold Shell]]s; the other two contain Goombas. Past this section is a Warp Pipe that leads to an area full of Goombas, with a Star near the top, and a nearby Warp Pipe leading to the [[Goal Pole]].

==Collectibles==
===[[Green Star]]s===
{| class="wikitable" style="text-align: center"
!Image
!Location
|-
|[[File:SM3DW W1-2 1st Green Star.jpg|150px]]
|The first Green Star is floating among some cloud platforms.
|-
|[[File:SM3DW W1-2 2nd Green Star.jpg|150px]]
|The player needs to climb three purple blocks to find a purple [[Mystery Box]]. Inside, they must defeat two Koopa Troopas to reveal the second Green Star.
|-
|[[File:SM3DW W1-2 3rd Green Star.jpg|150px]]
|At the end of the level, the player finds a [[Goomba Tower]] with the final Green Star in the middle of the stack.
|}

===[[List of Super Mario 3D World stamps|Stamp]]===
{{Multiple image
|align=right
|direction=horizontal
|width=70
|image1=SM3DW-GoldCoinStamp.png
|alt1=Wii U version
|image2=SM3DW_BF_GoldCoinStamp.png
|alt2=Switch version
}}

{| class="wikitable" style="text-align: center"
!Image
!Location
|-
|[[File:SM3DW Koopa Troopa Cave stamp.jpg|150px]]
|Just after the Clear Pipe to the last room, there is a rectangular ? Block. The player must get on top of it and jump to reveal a hidden rectangular ? Block. Jumping on top of that block reveals another, allowing them to reach a ledge. The player can then enter the Clear Pipe on the wall to warp into an enclosure below the ledge, containing the stamp and several coin stacks. The stamp is a [[Coin]].
|}

==[[List of Luigi sightings in Super Mario 3D World|Luigi sightings]]==
Right at the beginning, if the player turns the camera to the right, then an 8-bit Luigi can be seen on the wall, crouching and uncrouching. A second 8-bit Luigi can be seen at the beginning. If the player waits until the in-game timer says 104, a Luigi will exit the pipe, and go back in at 99 on the timer. A third 8-bit Luigi can be seen on the world map. A Luigi will eventually exit the pipe on the top of the icon.

==Secret Warp==
[[Cat Mario]] is required. Slightly to the right of the clear pipe leading to the stamp, Cat Mario must climb the wall to reach the ledge with a [[World Warp Pipe]] that leads to [[World 2 (Super Mario 3D World)|World 2]].

==Infinite 1-Up trick==
This level is notable for having two places where the player can perform the infinite 1-Up trick within the first area. The first is in a hidden room on the platform after the first Clear Pipe, which can be accessed by [[Ground Pound]]ing the [[Crystal Block]]s on it; the trick can be performed by stealing shell from the Koopa Troopa in the room and bringing it near the hole on the right side of the room, allowing the player to gain a huge amount of extra lives at lightning speed. Another is the walls with two-block-wide gaps containing a Clear Pipe after the second Clear Pipe; the player can bring a Koopa Troopa shell and perform the trick easily.

==Enemies==
{{number of enemies
|image1=[[File:Koopa Troopa Artwork - Super Mario 3D World.png|50px]]
|name1=[[Koopa Troopa]]
|count1=12
|image2=[[File:SM3DW Mario Stealing Koopa Shell.png|50px]]
|name2=[[Unshelled Koopa Troopa|Beach Koopa]]
|count2=(from Koopa Troopas)
|image3=[[File:Goomba Artwork - Super Mario 3D World.png|50px]]
|name3=[[Goomba]]
|count3=12<br>(7 found on a Goomba Tower)
|image4=[[File:Mini Goomba SM3DW Prima.jpg|50px]]
|name4=[[Mini Goomba]]
|count4=6
|image5=[[File:GoombaTowerSM3DW.jpg|50px]]
|name5=[[Goomba Tower]]
|count5=1
}}

==Names in other languages==
{{foreign names
|Jap=ノコノコ地下洞窟
|JapR=Nokonoko chika dōkutsu
|JapM=Koopa Troopa Underground Cave
|ChiS=慢慢龟地下洞窟
|ChiSR=Mànmànguī Dìxià Dòngkū 
|ChiSM=Koopa Troopa Underground Cave
|ChiT=慢慢龜地下洞窟
|ChiTR=Mànmànguī Dìxià Dòngkū 
|ChiTM=Koopa Troopa Underground Cave
|Dut=Koopa Troopa-grot
|DutM=Koopa Troopa-cave
|Fre=Caverne Koopa
|FreM=Koopa Cave
|Ger=Ärger in der Koopa-Grotte
|GerM=Trouble in the Koopa Grotto
|Ita=Grotta dei Koopa
|ItaM=Koopa Grotto
|Kor=엉금엉금 지하 동굴
|KorR=Eonggeum-eonggeum jiha donggul
|KorM=Koopa Troopa Underground Cave
|Por=Gruta dos Koopas
|PorM=Koopa Grotto
|Rus=Подземелье куп-труп
|RusR=Podzemelye kup-trup
|RusM=Underground of Koopa Troopas
|SpaA=La gruta de los Koopas
|SpaAN=''Super Mario 3D World + Bowser's Fury''
|SpaA2=La gruta de los koopas
|SpaA2N=''Super Mario 3D World''
|SpaAM=The Koopas' Grotto
|SpaA2M=The Koopas' Grotto
|SpaE=La gruta de los Koopas
|SpaEM=The Koopas' Grotto
}}
{{SM3DW levels}}
[[Category:Underground areas]]
[[Category:Super Mario 3D World levels]]
[[de:Ärger in der Koopa-Grotte]]