Pipe To Another World

The Pipe To Another World, also known as the Multiverse Pipe, is a pink pipe that can appear in the Castle Courtyard. It seems to appear after every coin in every level is collected, though this behavior has deviated in reports.

Behavior
The Pipe to Another World is known to be incredibly unpredictable. When jumped in, it can take the player to a random level or sub-area. Usually, when the Pipe to Another World is used, a new star appears in the level or sub-area respectively.

However, the Pipe to Another World has the ability to warp to anomalous levels, such as Drip, Drip Cave or the Stained Glass Slide, even if they weren't encountered before finding the Pipe to Another World. If they were encountered beforehand, it will maintain the new star behavior. On some occasions, it has led to entirely new floors, such as the Castle Crawlspace or Castle Garden.

New Levels
The Pipe to Another World has been documented to lead to new levels not documented elsewhere. However, when found, these levels tend to be able to be found without the Pipe to Another World. These levels do not tend to be full courses, but it can occur.

The Firey Slide
Main article: The Firey Slide

The Firey Slide is a slide level about as long as the Tall, Tall Mountain slide. It has several fire-based obstacles, such as fireballs, flamethrowers, and Bullies. There is a regular star for reaching the end, and a timed star, similarly to The Princess' Secret Slide. When found, it usually can be discovered in a hidden teleporter somewhere in Lethal Lava Land.

Bully Battlefield
Main Article: Bully Battlefield

Bully Battlefield is one of the few new courses documented when entering the Pipe to Another World. It is seemingly a fusion of Bob-omb Battlefield and Lethal Lava Land with several bullies and lava pools. Big Bob-omb is replaced with a Big Bully, and the Bob-omb Buddies are replaced with Bully Buddies. The unused Blargg enemy has been documented to appear here. After being discovered, it usually either replaces Lethal Lava Land or Bob-omb Battlefield.

Scuttlebug Cavern
Main Article: Scuttlebug Cavern

Scuttlebug Cavern is another new course found when entering the Pipe to Another World. It is a large maze-like cavern similar to Hazy Maze Cave that is filled with Scuttlebugs. It has a new boss that is a larger version of a Scuttlebug known as the Queen Scuttlebug. When discovered, it usually replaces Hazy Maze Cave.

Magnet Cap in the Magnetic Mountain
Main article: Magnet Cap

Magnet Cap in the Magnetic Mountain is the cap switch course for the Magnet Cap. It is a large mountain similar to Tall, Tall Mountain with several Big Steelies standing still that can be moved using the Magnet Cap. After being discovered, it usually can be found replacing Cavern of the Metal Cap or Tall, Tall Mountain.

Tropic Trail
Main article: Tropic Trail

This level is a long winding path on what appears to be a tropical island. There are several enemies along the path such as Goombas and Koopas, and at the end is a star. There is also a 100 coin star, making it the only level that isn't a course that has a 100 coin star. When found, this level doesn't appear to replace a specific level but has been known to replace Sunshine Isles when the Rec Room is found in the copy.

Castle Attic
Main Article: Princess Peach's Castle/Castle Attic

The Castle Attic is an entire new floor, and seemingly the only entire floor found from the Pipe to Another World. It leads into several more levels. After being found in the Pipe to Another World, stairs will appear at the player's top floor that lead to the Castle Attic.