Linked Worlds Phenomenon

The Linked Worlds Phenomenon is an anomaly where a course leads back to the Castle Grounds or other castle areas, similarly to how Dire, Dire Docks connects to the lake area of the Castle Grounds. Every main course has been reported to have this phenomena.

Bob-omb Battlefield
In this course, part of the wall around the map can disappear and be replaced with a hill. Upon going up it, the hill would regularly lead into the Castle Grounds near the position Mario starts when a new save begins. However, one report says it lead to Bob-omb Village.

Whomp's Fortress
In this course, if the player grabbed Hoot and flew towards the skybox, the player could fall from the sky near the edge of the Castle Grounds.

Jolly Roger Bay
In this course, in the underwater cave, there could be a path upwards somewhere in the cave. Upon reaching the end, the player could be teleported next to the Castle Grounds' lake, though a report claims they ended up in Unagi Caves.

Cool, Cool Mountain
In this course, if the player fell down the area in between the Mother Penguin's area and the Wall Kicks Will Do area, the player could end up in the Castle Grounds sliding down a wall. However, several reports claim that instead of ending up in the Castle Grounds, they ended up in Cold, Cold Crevasse.

Big Boo's Haunt
In this course, if the player clips outside the cage, they can end up in the Castle Courtyard next to the cage. However, many reports claim they instead accessed Big Boo's Forest.

Lethal Lava Land
In this course, if the player attempts to enter the volcano, they could instead be flung to the Castle Grounds while taking damage from fire.

Shifting Sand Land
In this course, if the player jumps into a tornado, they could instead be flung from the sky into the Castle Grounds.

Hazy Maze Cave
In this course, if the player attempts to enter the Cavern of the Metal Cap, they could instead be flung out of the waterfall, similar to how you end up when getting pushed in the river of CotMP.

Dire, Dire Docks
Seeing as this course is already connected to the Castle Grounds, there has been no Linked Worlds Phenomenon associated with it yet.

Wet-Dry World
There has been no discovered Linked Worlds Phenomenon in this course.

Tall, Tall Mountain
In this course, if the player continued going towards the skybox after getting pushed up by a gust of wind, they could be flung from the sky to the Castle Grounds.

Tiny-Huge Island
Oddly, if the player jumps into the middle Tiny-Huge Island painting, they can be teleported back to the Castle Grounds.

Snowman's Land
In this course, if the Snowman blows the player off of the platform in front of it, they can be flung into the Castle Grounds.

Tick Tock Clock
In this course, if a player punched a random wall in the course, a hole could appear that when entered could lead back to the Third Floor of the castle. However, some reports state it instead lead to Clockwork Innards.

Rainbow Ride
In this course, if the player fell off of the course, they could end up falling into the Castle Grounds.