"Underground Tunnel" redirects here. For stage 4-1 ofDance Dance Revolution: Mario Mix, seeFrozen Pipes.

Tunnel
First appearance	Mario & Luigi: Bowser's Inside Story (2009)
Latest appearance	Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey (2018)
Greater location	Mushroom Kingdom
Inhabitants	Choombas, andCoalbits

Map

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TheTunnel (also known as theUnderground Tunnel)^[1] is a location inMario & Luigi: Bowser's Inside Story and itsremake. It is located beneathCavi Cape and located south-east of theToad Town Caves.Bowser is catapulted here by a group ofBob-ombs shortly afterFawful kidnapsPrincess Peach. Only two types of enemies appear here.

The area appears to be an underground railroad under construction. After navigating the tunnels, Bowser meets up with theMonty Bros. One of the four explains that they are trying to make a tunnel that will connect them to Toad Town. They use a huge machine to get the job done. A disgruntled Bowser reluctantly helps them achieve their goal.Mario andLuigi have to go to theLeg Outpost to give him power, though. Bowser has to achieve this before the battery dies in ninety seconds, in order to avoid having to pay 50 coins for a replacement battery. Bowser's power overcomes the challenge and the machine is totaled. Bowser heads in the next room to the Toad Town Caves, where the Dark Star is sealed.

The Mario Bros. are unable to access the Tunnel, as it requires breaking rocks and pushing buttons, which only Bowser can do.

The background music in the Tunnel is a slow and sombre composition, which is also used for the Toad Town Caves,Tower of Yikk, andBowser Path.

AChakroad can be found here, hidden beneath a wooden crate near aWarp Pipe that leads to the entrance of the area.

Enemies

• Choomba
• Coalbit

Items

Item	Icon	Location
Supersyrup Jar		In a brick in the southern scene of the west area.
Cheap Ring		In a brick in the big room beyond the middle or the rightmost crack in the east area.
Rock Shell		In a brick in the room beyond the leftmost crack in the east area.
Special Fangs		In a brick in the southwesternmost scene of the west area.
Blitty		FromChoombas.

Multimedia

The Path of Secrets - Plays atBowser Path, the Tunnel,Toad Town Caves, and theTower of Yikk in the original game.

File infoMedia:M&LBIS The Path of Secrets.oga ​

The Path of Secrets (Inside Bowser) - Plays at Bowser Path, the Tunnel, Toad Town Caves, the Tower of Yikk while inside Bowser, and during the first visit to theTrash Pit, in the original game.

File infoMedia:M&LBIS The Path of Secrets (Inside Bowser).oga ​

The Path of Secrets DX - Plays at Bowser Path, the Tunnel, Toad Town Caves, and the Tower of Yikk in the remake.

File infoMedia:M&LBIS+BJJ The Path of Secrets.oga ​

The Path of Secrets DX (Inside Bowser) - Plays at Bowser Path, the Tunnel, Toad Town Caves, the Tower of Yikk while inside Bowser, and during the first visit to theTrash Pit, in the remake.

File infoMedia:M&LBIS+BJJ The Path of Secrets (Inside Bowser).oga ​

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Map

Prima Official Game Guide description

• "The explosion in Bowser's Castle sends Bowser flying across the kingdom, dropping him into a hole in the ground at Cavi Cape. Bowser pulls himself up to discover he's inside a network of tunnels that have not yet been completely connected. The tunnel system beneath the kingdom is his best bet for finding a way back up to the surface, so Bowser continues exploring."

Names in other languages

References

• Underground areas
• Mario & Luigi: Bowser's Inside Story locations

• Articles that need more images
• Pages with audio files
• Articles with unsourced foreign names