The manga adaptation of the game Kingdom Hearts: Chain of Memories by Shiro Amano. It is the second of four manga based off the Kingdom Hearts series of games, preceded by the manga of Kingdom Hearts I and succeeded by the manga of Kingdom Hearts II. Contains even more humor than the manga adaption for the first game.
- Adapted Out: All of the Disney worlds from the game are cut out except for Agrabah.
- Adaptational Heroism: While Sora isn't a Villain Protagonist, he cruelly abandons Donald and Goofy to explore the twelfth floor on his own, and tells Jiminy to shut up. Here, he's not as cruel to them, and tells Jiminy that finding Naminé is his problem, not theirs. The worst he does is call them "pigheads" for a Visual Pun.
- Bittersweet Ending: Those who've played the game would already know what happens to Sora and his friends at the end.
- Brick Joke: Remember the turban Sora was wearing in one of the "front cover" pages in the first manga? He wears another one while impersonating a genie in Agrabah.
- Crucified Hero Shot: Marluxia uses his plants to hold Naminé this way in the climax.
- Defiant to the End: Unlike in the game, Vexen angrily charges at his assailant before being cut down.
- Dies Differently in Adaptation: Larxene's death ends up happening due to Sora Donald and Goofy getting water on her causing her lightning to short circuit and blow her up, whereas in the games, she just fades away upon defeat.
- Epic Fail: Sora, Donald, and Goofy attempt a Trinity Limit during the fight against Axel, only to crash into a wall.
- Exactly What I Aimed At: Larxene throws her knives past the heroes and they make fun of her, only for the knives to zap them from behind.
- Feed It with Fire: Donald uses Thunder on Larxene, unaware that electricity is her element. She even pretends the attack is hurting her so Donald will keep charging her up.
- Garden of Evil: Marluxia's room is full of massive man-eating plants and similar creatures.
- Lighter and Softer: Than the original game, with only Axel's machinations being played completely seriously.
- Oh, No... Not Again!: Marluxia tells the heroes "To find is to lose, and to lose is to find." He repeats himself when they weren't paying attention. When he says it a third time, they comment that he's either a weirdo or just likes to hear himself talk, which he denies. After he leaves them, he says the phrase a fourth time, then realizes what he just did and complains.
- Shout-Out: Sora mentions the Dokodemo Door from Doraemon when the heroes step through a door in Castle Oblivion, only to wind up in Traverse Town.
- Spared by the Adaptation: Riku Replica survives the events of the story and leaves Castle Oblivion with some Vexen Replicas to find their own future.
- Villains Out Shopping: The Organization XIII members are shown doing incredibly mundane things like reading, doing puzzles, etc. Zexion, Vexen, and Lexaeus even have a chores chart.