Editing Castle Oblivion

{{Youmay|the World|{{c|Castle Oblivion|track|the field theme}} or [[Card 01: Castle Oblivion|the chapter in the ''Kingdom Hearts Chain of Memories'' manga]]}}

Castle Oblivion is a mystical castle found at the end of passage floating in the middle of nowhere. It is located within the [[Realm Between]], surrounded by dark clouds with faint lights piercing through far behind. The castle has an uneven and twisted design with towers pointing in all directions. Some even stick out from underneath the road. The outside is a dark gold with turquoise roofs, while everything on the inside is generally white. The interior is implied to be incredibly vast, to the point one would get lost in it, as was the intention of Aqua; the Organization compensate by using Dark Corridors. Axel has complained that searching the castle is next to impossible, stating it's "like counting grains of dust in a room of sneezing people".

Somewhere among the thirteenth floors is a meeting room the Organization uses to discuss plans, as well as monitor the other floors via a crystal ball. This is also where Naminé is kept prisoner. The basement also has a meeting room which is dimly lit, almost appearing to be blue in color, and usually where Zexion can be found.<!--Zexion is always the first to show up here, so it stands to reason this is where he "observes" scents of darkness--> Vexen also has an unseen laboratory where he works on the [[replica]] project.

Battles against most Organization members in ''Kingdom Hearts Re:Chain of Memories'' and the [[Riku Replica]] transport Sora and Riku to an arena within some sort of pocket dimension called {{nihongo|'''{{a|Station of Remembrance}}'''|追憶の園}}. The arena consists of a circular, grey, and decorated floor, hanging in the air, with four pillars surrounding the platform. In ''Kingdom Hearts Chain of Memories'', the members are fought within the hallways instead. Marluxia's second form is also fought in sort of pocket dimension - accessed from the thirteenth floor - called {{nihongo|'''{{a|Station of Oblivion}}'''|忘却の園}}. The arena is similar to the Station of Remembrance, though it's a lot bigger and the room is a lot brighter. His Radiance of Darkness technique allows him to temporarily turn the skies dark and starry. In ''Kingdom Hearts Chain of Memories'', the final battle against Marluxia takes place in a starry sky-like void instead. In the remakes, the third and final Marluxia battle takes place in a dark and blue sky void as well, and on top of what appears to be the remains of the specter from the previous fight turned giant.

The castle is eventually discovered by [[Xemnas]] of Organization XIII, who decides to convert it into a second headquarters for the Organization. It is intended to be a place to research memories, an important topic to the [[Nobody|Nobodies]] of the Organization, who have only their memories with which to form personalities. Xemnas sends [[Xigbar]] and [[Xaldin]] to recruit more members for the Organization, as they need a large group in order to run the castle. Despite rumors among the Organization that Xemnas intends to locate the Chamber of Waking, to complement the [[Chamber of Repose]] built under [[Hollow Bastion]], they never do.<ref>'''''Kingdom Hearts II Final Mix'', Xigbar:''' "But did you know there's something he DIDN'T share? The Chamber of Repose is part of a pair. The Chamber of Waking is the other. Another graveyard, if you want to call it that. It was constructed by someone other than Xemnas himself. And that's where he'll find it. That's where he'll find his other "friend.""</ref>

After defeating [[Ansem, Seeker of Darkness]], and restoring the damaged worlds, [[Sora]], [[Donald Duck]], and [[Goofy]] find themselves in a grassy field with [[King Mickey]]'s dog, [[Pluto]]. They follow Pluto along the path to Castle Oblivion, and as soon as they enter the castle, they forget all of their skills and are forced to rely upon the castle's memory-based card system. Although Marluxia and Larxene tell them their memory loss is simply the nature of the castle, it is revealed that the mysterious girl Naminé is actually the one reshaping Sora's memories, so that Marluxia can use Sora as a puppet against Xemnas. The scheme fails thanks to the meddling of Axel (who was actually on orders from Xemnas and [[Saïx]] to rid the Organization of traitors), who frees Naminé, and Marluxia and Larxene are destroyed at Sora's hand. Sora then uses one of Xemnas's pods so that Naminé can restore his memories, and is eventually moved to [[Twilight Town]].

File:Wizard KH.png|[[Wizard]]<br>{{KHCoM}}{{KHc}}

File:Marluxia (Second Form) KHUX.png|'''[[Marluxia (Second Form)]]'''<br>{{KHCoM}}