Kingdom Hearts Series (manga)

Kingdom Hearts is Shiro Amano's manga adaptation of the Kingdom Hearts series.

Kingdom Hearts
The first series was based on Kingdom Hearts. It was released in 4 separate books and was translated to English by TOKYOPOP. It, unlike the other mangas, was made to be read left to right, while the others were right to left.

Differences
The manga includes many changes from the game:
 * The manga includes a prologue which covers Sora and Kairi's first meeting.
 * The only Keyblades in the manga are King Mickeys, Kingdom Key, and the one Sora free's Kairi's heart with.
 * In the manga, Sora is the one who finds Kairi, unlike in the video game, when he and RIku talk about this new girl that was at the mayors house.
 * The story begins after Sora wakes up from his Awakening, and Tidus, Selphie, and Wakka are not shown.
 * The King's letter is written slightly differently.
 * The night of the storm includes a scene at Riku's house.
 * Ansem's lines are slightly different.
 * Sora uses quotes from martial arts books to plan his boss strategies.
 * Sora's encounter with Leon and Yuffie is extended.
 * Sora's meeting with the Dalmatians is not covered.
 * Rather than tossing the Keyblade back to Sora, Riku causes it to rematerialize in Sora's hands.
 * The destruction of Radiant Garden is covered with more detail, including a scene with Leon, Yuffie, and Aerith as children.
 * Aladdin uses his first wish to save Sora and his friends from a pit of quicksand, rather than to eliminate a swarm of Heartless. He uses his second wish to save Goofy, not Jasmine.
 * The Pot Centipede does not appear, and Maleficent takes Jasmine, rather than Riku.
 * Deep Jungle and Halloween Town do not appear in the manga.
 * In Atlantica, the Crystal Trident is never found or used.
 * The Lost Boys appear in Neverland.
 * Goofy finds the one gummi block they need in a Rock, Paper, Sissors fight with the lost boys.
 * Riku does not use Dark Mode during his first boss fight against Sora.
 * Instead of Sora and his friends fighting Maleficent, Riku-Ansem simply murders her.

Kingdom Hearts: Chain of Memories
The second series was based on Kingdom Hearts: Chain of Memories. It was released in 2 chapters and translated to English by TOKYOPOP.

The Kingdom Hearts: Chain of Memories Manga has a much lighter tone than that of the game, as evidenced by many things, including the following:

Differences

 * When Axel first arrives to test Sora, he has his hood up.
 * Sora's first confrontation with Axel is a farce, including Sora crashing into the wall alongside Donald and Goofy.
 * Marluxia always has flowers around him.
 * Marluxia and Larxene have a small party, where they drink soda and eat chicken wings.
 * Zexion, Lexaeus, and Vexen are shown doing chores, and even have a chore wheel. There are eight chores: Vexen and Lexaeus both have three, while Zexion has two. After Vexen's death, Lexaeus assumes that he will have to do Vexen's chores in addition to his own.
 * The Traverse Town, Agrabah, Twilight Town, and Destiny Islands World Cards are the only ones that Sora is shown to use.
 * The Hollow Bastion and Destiny Islands World Cards are the only ones that Riku is shown to use.
 * Riku kills Zexion.
 * The Riku Replica lives, and leaves Castle Oblivion along with multiple Vexen Replicas.
 * Jiminy never writes 'Thank Naminé' in his journal.
 * Unlike the game, Sora remembered who Aladdin is despite some difficulties at first.
 * Sora, Donald and Goofy try to save Jasmine by pretending to be genies. After Jafar makes an impossible wish for them to grant (for Princess Jasmine to fall desperately in love with him, stating that a sultan has need for a princess), Aladdin springs in to action, while Sora and co. follow suit.
 * Instead of setting Genie free with the last/3rd wish, Genie was freed with the 2nd one though he still insisted he would grant the 3rd wish (but he can grant more than three since he was freed). This breaks the canon for both the original version of CoM, Kingdom Hearts, even the original version of the film Aladdin.
 * Genie played along in granting wishes (which logically ended up as just 1, by making him Sultan of Agrabah) for Jafar. Especially tricking him into turning into a Genie himself.
 * Before Sora fights Marluxia, he uses thorns to hold Naminé in a similar fashion to being crucified. Donald and Goofy save and heal her from this painful method of imprisonment. It is shown that this seems to have left her unconscious, possibly due to the pain.
 * Tidus, Selphie and Wakka did not appear again because they didn't appear in the manga adaption of the first Kingdom Hearts.
 * Small TV's were shown in Naminé's room. The TV Brand name was Nomura, the last name of Kingdom Hearts creator Tetsuya Nomura. Marluxia is also seen eating Nomura-brand chicken.
 * Rather than the Destiny Islands card being transformed into the Riku Replica's fake good luck charm, Axel gives the card to Sora right after he kills Vexen in the Twilight Town floor.
 * Instead of being incinerated, Vexen died by being slashed from Axel's chakrams.
 * Larxene died by getting wet, causing her to short-circuit.
 * While going towards the final floor, Sora, Donald and Goofy came across a vending machine of warm potions and elixir. Goofy buys an elixir, and wins a free drink.
 * Marluxia said "In this place, to find is to lose and to lose is to find" four times.
 * Vexen thought that Xemnas and Riku wore the same cologne that's why his scent was very familiar to Xemnas'
 * Instead of Sora and co. meeting Cid alone in the first district, they are shown meeting him along with Leon and co. while making dinner.
 * Sora, Donald, and Goofy never re-face the armor.
 * Sora and co. are trying out a new resturaunt when they get attacked by heartless and can't defend themselves. Leon comes in to save the day.
 * Donald dosn't say "thunder" when he had forgotten his magic, instead, he said things to like "Sand---wich?"
 * Goofy seems to be ordering alot of fast-food in his sleep when Sora is visited by Marluxia.

Kingdom Hearts II (manga)
The third series was based on Kingdom Hearts II. This series will be told in 5 chapters. (Only volume one and two have been translated so far with a third volume being released soon.) Kingdom Hearts II seems to take a more serious tone than Kingdom Hearts: Chain of Memories, but still has some humorous scenes.

Kingdom Hearts 358/2 Days
The fourth series is based on Kingdom Hearts 358/2 Days. So far only the prelude, first, second, third, and fourth chapters have been translated.

Differences

 * Axel is the one who teaches Roxas to fight rather than Marluxia.
 * Xion reveals her face to Roxas before they leave for their mission on Day 25. In the game, she revealed her face just after they arrived in Twilight Town.
 * In Roxas's dream with Xemnas, he hears Sora's name the first time in the dream.
 * On the seventh day, before Roxas wakes up, three Dusks attempt to play a prank on him by sticking a clothes pin on his nose. Then, Axel comes in and stops them.
 * Zexion never goes on a mission with Roxas, he just introduces himself and gives Roxas some fish he made.
 * Sora, Donald, and Goofy make a brief physical appearance just as they're about to fight Marluxia in Castle Oblivion. This was never seen in the game since Sora and the others never make a physical appearance.