World Cards

World Cards are a type of map card in Kingdom Hearts: Chain of Memories which can transform floors of Castle Oblivion into entire worlds made out of Sora or Riku's memories. These cards are usually created by members of the Organization, but DiZ and Naminé are both able to make cards for Riku, and one appears on its own to King Mickey. Naminé is even able to fashion these cards into trinkets, as she does for the Riku Replica.

The World Cards are not all available at once. In "Sora's Story", Sora receives the Traverse Town card from Marluxia, the Wonderland, Olympus Coliseum, Agrabah, Halloween Town, and Monstro cards from Axel, the Atlantica, Neverland, Hollow Bastion, and 100 Acre Wood cards from Larxene, the Twilight Town card from Vexen, and the Destiny Islands card from the Riku Replica. In "Reverse/Rebirth", Riku receives the Hollow Bastion card from DiZ, the Traverse Town, Agrabah, Monstro, and Never Land cards from Ansem, then the Atlantica, Halloween Town, Olympus Coliseum, and Wonderland cards from Ansem again, the Destiny Islands card from Zexion, the Twilight Town card from the King, and the Castle Oblivion card from DiZ.

Traverse Town
A haven for those whose homes fell to darkness.

Can be used on the 1st floor or basement floors 11 through 8.

Characters:
 * Leon
 * Yuffie
 * Aerith
 * Cid

Wonderland
A magical land full of eccentric residents.

Can be used on floors 2 through 6 or basement floors 7 through 4.

Characters:
 * Alice
 * The Queen of Hearts
 * The White Rabbit
 * Card of Hearts
 * Card of Spades
 * The Cheshire Cat

Olympus Coliseum
A legendary arena where heroes test their might.

Can be used on floors 2 through 6 or basement floors 7 through 4.

Characters:
 * Hercules
 * Philoctetes
 * Hades
 * Cloud

Agrabah
A bustling desert city with a grand palace.

Can be used on floors 2 through 6 or basement floors 11 through 8.

Characters:
 * Aladdin
 * Genie
 * Jasmine
 * Iago
 * Jafar / Jafar (Genie)

Halloween Town
A terrifying town of tricks and treats.

Can be used on floors 2 through 6 or basement floors 7 through 4.

Characters:
 * Jack
 * Sally
 * Dr. Finkelstein
 * Oogie Boogie

Monstro
Inside the belly of the giant whale.

Can be used on floors 2 through 6 or basement floors 11 through 8.

Characters:
 * Pinocchio
 * Geppetto

Atlantica
Undersea kingdom protected by King Triton.

Can be used on floors 7 through 10 or basement floors 7 through 4.

Characters:
 * Ariel
 * Sebastian
 * Flounder
 * Ursula

Never Land
Inside Captain Hook's pirate ship.

Can be used on floors 7 through 10 or basement floors 11 through 8.

Characters:
 * Peter Pan
 * Tinker Bell
 * Wendy
 * Captain Hook

Hollow Bastion
A once peaceful castle ruined by Maleficent.

Can be used on floors 7 through 10 or basement floor 12.

Characters:
 * The Beast
 * Belle
 * Maleficent / Dragon Maleficent

100 Acre Wood
A quiet wood resided by friendly fellows.

Can be used on floors 7 through 10.

Characters:
 * Winnie the Pooh
 * Piglet
 * Owl
 * Roo
 * Eeyore
 * Tigger
 * Rabbit

Twilight Town
A mysterious town between light and dark.

Can be used on the 11th floor or basement floor 2.

Destiny Islands
Serene islands where Sora and Riku were born.

Can be used on the 12th floor or basement floor 3.

Characters:
 * Tidus
 * Wakka
 * Selphie
 * Fake Naminé
 * Fake Riku

Castle Oblivion
Sora's Story: The castle's top floor, where Marluxia awaits. Reverse/Rebirth: Where the darkness in Riku's heart — and Ansem — are free.

Can be used on basement floor 1.

Characters:
 * Naminé
 * Riku Replica
 * Vexen
 * Lexaeus
 * Zexion
 * Axel
 * Marluxia
 * Larxene
 * DiZ

Trivia

 * Although Sora, Donald, and Goofy visited the world Deep Jungle in Kingdom Hearts, it was not included in Chain of Memories as the estate of Edgar Rice Burroughs did not allow Disney and Square Enix to reuse the story. It appeared in early treatments for the game, though.


 * Though Castle Oblivion as a World Card is not obtained by Sora, and does not appear in his "World Cards" menu in Chain of Memories, it does appear in his "World Cards" menu in Re:Chain of Memories, and even uses the image of Riku's Castle Oblivion card as its depiction.


 * During cutscenes in Kingdom Hearts Re:Chain of Memories, the Destiny Islands card shows the Kingdom Hearts II design rather than the one used in Kingdom Hearts: Chain of Memories, however, once you actually receive the card, the design from the original game is shown to be on the card instead. The reason for this is unknown.


 * These cards may be the mechanism by which the Organization takes Sora, Donald, and Goofy's memories, and may have actually been created by Naminé. Except for in Traverse Town, Sora, Goofy, and Donald seem to have lost all their memories of each world they visit before they enter them, and the cards are said to be made by using their memories. However, the gang is able to at least recognize that they've been to each world, as they comment in Twilight Town that they don't recognize it.

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