Editing Mickey Mouse

Originally a ship's hand working with Captain [[Pete]] at [[Timeless River]], Mickey became a student of the [[Keyblade Master]] [[Yen Sid]]. After completing his training and becoming a Keyblade Master himself, Mickey travels to other worlds to battle the forces of [[darkness]]. Once believing that darkness had to be eliminated, he eventually realized that light and darkness are interdependent and cannot exist without the other due to his encounters with [[Riku]], whom he forms a strong bond with throughout the series.

Mickey is an important figure in the conflict with [[Master Xehanort]], and was later one of the first to notice the threat of the [[Heartless]], inventing the first [[Gummi Ship]] to travel to other worlds to fight against the monsters.

Despite his mistakes, Yen Sid keeps him on as his apprentice and Mickey is eventually able to wield the Keyblade.

At one point, Mickey visited Ansem to discuss the growing threat the [[Heartless]] posed to the stability of the worlds. Their meeting is interrupted by [[Terra-Xehanort|Xehanort]], who seemingly disturbs the King due to his resemblance to [[Terra]] and having the same name as the Keyblade Master that caused [[Eraqus]]' pupils to vanish. Because of his feelings towards the man and his persistent interest in certain experiments, coupled with the growing threat of Darkness, Mickey advises Ansem to review the research in his lab's computer in case Xehanort continues the research behind his back.

Some time after this, the two of them walk through [[The Great Maw]], where Riku momentarily collapses under the strain of the darkness in his heart. Although a concerned Mickey tries to help, Riku shrugs him off. The two of them eventually split up after Riku realized that he couldn't completely rid himself of the darkness festering in him.

|If Sora falls in battle against certain enemies, the King will arrive to stall the enemy and restore Sora's health.

When Goofy apparently dies after taking a nasty blow to the head while saving Mickey from the same fate, Mickey swears that the Heartless would pay and permanently discards his Organization XIII disguise. They are later relieved to discover that Goofy was only unconscious. When he and Sora confront [[Xemnas]], he jumps after Xemnas into a corridor of darkness before it closes, thus preventing Sora, Donald, and Goofy from going after him, but since he appears later in Twilight Town, it is apparent that he could not follow Xemnas all the way back to the Organization's base.

Sora and the others meet him in Twilight Town, where they find a way into [[The World That Never Was]] through The Other Twilight Town DiZ had created. When they enter the world, Mickey goes ahead of Sora to look for Ansem the Wise. He eventually finds him and rescues him from a group of Nobodies. Ansem then attempts to use the [[Kingdom Hearts Encoder]] to convert Kingdom Hearts into data, but is unsuccessful and vanishes when the machine explodes.

After Sora and Riku end the Organization's plot, Mickey waits with Donald, Goofy, and Kairi on Destiny Islands for their return. Once they do, he runs to Riku and congratulates them both for defeating Organization XIII. During the end credits, King Mickey is seen returning with Donald, Goofy, [[Scrooge McDuck]], [[Huey, Dewey, and Louie]], Pluto, and [[Jiminy]] to Disney Castle, where he shares a kiss with Queen Minnie.

Following the digital Sora's time in Traverse Town, he is attacked by Heartless. After disposing of them with the Star Seeker, he tries to leave the library to check the castle, but finds himself locked in, along with Jiminy, Donald, and Goofy. Somehow, they have been transported into the digital journal itself. While in the journal, he joins forces with Data-Sora and the journal itself (in the form of Riku) to dispatch the Heartless and debug the digital world. After defeating [[Sora's Heartless]], who was corrupting the journal, Mickey and his friends are returned to the real world when the debugging is completed, but a message claiming that a door to a new world has opened appears on the screen. Preparing for another adventure, Mickey requests to be taken into the digital world again to solve this new mystery.

Inside, he escorts Data-Sora throughout Castle Oblivion until they encounter the data version of Naminé, who tells them about Terra, Ventus, Aqua, and the reason behind the [[Bug Blox]] corruption, which was caused by the real Naminé when she removed Sora's memories and later restored them.

Later, Mickey reports to Yen Sid that he believes he has finally found where Ventus's missing heart is, leaving only Terra's heart to be found. Their discussion quickly shifts towards the topic of Master Xehanort, who Mickey is stunned to learn will return due to the defeat of his Heartless, Ansem, and his Nobody, Xemnas, and the subsequent restoration of Xehanort. Fearing that they may have to fight more than a "single one of Xehanort", Yen Sid orders Mickey to bring Sora and Riku before him so that they may take the [[Mark of Mastery exam]].

Later on, when Sora and Riku do not return from the Sleeping Worlds at the expected time, Mickey enters and finds Riku in Where Nothing Gathers, using a Stopza spell to freeze [[Young Xehanort]] and help him save the comatose Sora, but Xehanort remains unaffected by the spell and knocks Mickey aside in order to battle Riku. Following the fight, Mickey and Riku meet the revived Master Xehanort, who explains to them the details of his past endeavors and his continuing plans to recreate the χ-blade and restart the Keyblade War. Mickey openly accuses Master Xehanort of ruining the lives of Terra, Aqua, Ven, and Master Eraqus, but Xehanort merely quips that it was their destiny. As Master Xehanort prepares to turn Sora into a vessel for a piece of his heart, Xemnas physically restrains Mickey from rescuing him. Lea arrives in time to protect Sora, and Ansem responds by releasing his Guardian, who grabs Mickey and Riku, but is knocked out by Donald and Goofy. The [[real Organization XIII]] are then forced to retreat to their own time periods, but Xehanort ensures they will all clash again in the future.

After Sora's departure, Mickey, Donald, and Goofy return to Disney Castle with Yen Sid. Mickey reunites with Queen Minnie and Pluto, where he then watches fireworks in celebration of Xehanort's defeat. Mickey then travels to Destiny Islands and soon witnesses Sora fading away as a result of misusing the power of waking.

Mickey is an anthropomorphic mouse with black fur, round ears of the same color, and a thin, long, black tail. The fur on his face is cream-colored. His usual outfit in the ''Kingdom Hearts'' series is a modified version of the one he wears in modern Disney cartoons. He wears a short-sleeved jacket with white lining. The top half of this jacket is black, while the bottom half is red, and there are two yellow straps dangling in front of it. His pants are red and sport a zipper going down the front of each leg. Each leg also has a yellow pouch with a black strap that partially cover the zipper, as well as a blue strap on the outer side of each pant leg. Mickey wears very large, yellow shoes with grey backs and two orange, intersecting straps attached to the front of each shoe. Throughout the ''Kingdom Hearts'' series, Mickey appears in numerous outfits and forms from different worlds. In all of his appearances, except for when he wears the [[black coat]], Mickey dons the famous, white gloves common to most older Disney characters.

As king of Disney Castle, Mickey is much more responsible and dutiful. He commends the respect and loyalty of his subjects, especially Donald and Goofy. Mickey is very friendly and loyal, always thinking positively while trying to lift the spirits of others. He is always ready to help his friends and tries to protect them at any cost, showing a determination that none could dampen. Mickey always tries to keep the promises he makes to his friends, even when he doesn't always agree with said promises, showing a great deal of loyalty to those who earned his friendship. When he sees his friends get hurt, he becomes surprisingly serious and angry, such as when Goofy appears to be mortally wounded after saving him during the [[Battle of the 1000 Heartless]]. In addition, Mickey has shown a good deal of guilt over the fates Aqua, Ventus, and Terra had faced, believing he was partially responsible, especially with Aqua who was stranded in the Realm of Darkness for years. Despite this, Mickey resolved to save them.

The King appears in ''Kingdom Hearts Chain of Memories'' as a [[friend card]] in ''Reverse/Rebirth''. His card has 12.5% chance of appearing during battle if available. When used, King Mickey performs [[MM Miracle]], which heals Riku, stuns and deals damage to all enemies, and reloads Riku's deck. Stocking multiple King Mickey cards enhances the effect of MM Miracle, increasing the amount of health restored and damage done to enemies. Amongst using enemy cards with healing effects, such as [[Oogie Boogie]], Mickey's friend card is one of the few methods in which Riku can heal. In ''Kingdom Hearts Re:Chain of Memories'', Riku has two new sleights. He can perform the Holy Burst and Inverse Burst Sleights with King Mickey, in normal and Dark Mode respectively, in which Mickey hovers and shoots orbs of light from his Keyblade.