Corridors of Darkness

Corridors of Darkness are pathways of darkness that link the worlds of the Kingdom Hearts universe together. The Heartless use these extensively to reach other worlds, as do many other characters. Organization XIII and its subordinate Nobodies utilize these pathways, because they can use the darkness without fear of its corrupting effects on the heart since Nobodies have no hearts. Other characters who have used these corridors include Sora, Donald, Goofy, Riku, Kairi, Naminé, DiZ, Pluto and King Mickey. Of these, only Riku, Naminé and DiZ have been responsible for summoning the portals, and it has been suggested that one must have a strong heart to resist the overwhelming darkness which threatens the user of dark powers. It seems those who use the Corridors regularly gain a Black Cloak as a symbol of their ability to resist the corruption.

Pros

 * Easier way to move from world to world
 * Faster than a Gummiship

Cons

 * If one who has a heart uses the corridor, it will corrode the heart until nothing is left.  Presumably turning that person into a nobody without a heartless.