Switchblack Ruins
Template:Levelbox
Switchblack Ruins, or World 
Castle-2, is the second course in the seventh world of Super Mario 3D World and its Nintendo Switch port Super Mario 3D World + Bowser's Fury, World Castle. It becomes accessible by beating Fort Fire Bros., and its completion unlocks Boiling Blue Bully Belt.
Layout
The level starts in a dark hallway that leads to the first set of Switch Panels and a Spiny. Activating the Switch Panels opens up the path to some Question Blocks and the second set of Switch Panels guarded by two Spinies. Stimulating this set of Switch Panels leads to the level's Checkpoint Flag, the third group of Switch Panels and a Fire Piranha Plant. A moving platform takes the player to the final Switch Panel set, guarded by four Spinies and two Fire Piranha Plants. A nearby pipe leads to the Goal Pole.
Green Stars
- Green Star 1: In a circular room before the checkpoint, the player must use the Fire Flower to light all four torches to reveal the green star.
- Green Star 2: Immediately after the checkpoint, the player must keep going right to find a hidden room with the green star.
- Green Star 3: The third green star is behind the green Warp Pipe near the end of the level. The player needs to unveil an invisible rectangular ? Block to reach it.
Stamp
- In the second volcanic room, the player has to jump to the rightmost platform to find the stamp. The stamp is a Spiny.
Enemies
Names in other languages
| Language | Name | Meaning |
|---|---|---|
| Japanese | まっくらスイッチ遺跡 Makkura suicchi iseki |
Pitch Black Switch Ruins |
| Chinese | 漆黑開關遺跡 Qīhēi Kāiguān Yíjì |
Pitch Black Switch Ruins |
| Dutch | Schimmige schakelkamers |
Shady switch rooms |
| German | Fackeln in der Finsternis |
Torches in the darkness |
| Italian | Antro tenebroso |
Gloomy cave |
| Portuguese | Quem apagou a luz? |
Who turned off the lights? |
| Russian | Кто выключил свет? Kto vylyuchil svet? |
Who turned off the lights? |
| Spanish | ¿Quién apagó la luz? |
Who turned off the light? |
