Super Smash Bros. Ultimate

 is a fighting game for the, featuring characters and properties from various Nintendo franchises, with occasional appearances from other third party properties. This is a list of all Kingdom Hearts property added to Super Smash Bros. Ultimate.

Development
In the previous Super Smash Bros. game, , an official Smash Bros. Fighter Ballot was announced for users to vote for their favorite characters as an upcoming downloadable content character. On December 15, 2015, game director revealed the game's final DLC character,, was the ballot's winner among "realizable and negotiable characters". After the announcement of Super Smash Bros. Ultimate, Sakurai revealed that the ballot was primarily used to determine the newcomer roster for that game instead, and on October 5, 2021, he revealed that Sora was the real winner of the ballot, having gotten permission to include Sora after a chance meeting with a Disney executive at a "certain game awards venue".

Tetsuya Nomura revealed that while Disney was eager about Sora's inclusion in Super Smash Bros., he was very picky, thinking it would be hard to pull off regarding the lore in the series.

Characters
On October 5, 2021, Sora was announced as the final DLC character, and was released on October 18, 2021, as part of Challenger Pack 11.

Sora
Sora's default appearance is based on his outfit from , and he wields the Kingdom Key. His alternate costumes are based on his Kingdom Hearts II outfit, his Kingdom Hearts 3D: Dream Drop Distance outfit, his Kingdom Hearts III outfit, his Timeless River outfit, Valor Form, Wisdom Form, and Ultimate Form.

Moveset
Sora excels at airborne fighting. He has a high midair jump, and is quite floaty. Sora is very light, making him easy to launch.


 * Standard moves


 * Special moves


 * Other moves

Classic Mode
is a game mode in Super Smash Bros. Ultimate. Each character faces a unique series of battles.

Sora's Classic Mode is titled "The Light That Clears the Darkness".

After completing Classic Mode, the will roll. During the credits, Blast Away! -Gummi Ship II- plays for Sora. After the credits, a is shown, with Sora's congratulations screen referencing Promise, the artwork for the menu of Kingdom Hearts III.

Hollow Bastion
Hollow Bastion is a stage included in Challenger Pack 11. It consists of a large platform designed after Hollow Bastion's walls, with pipes, stained glass, and a Heartless emblem on the front. A smaller platform floats above, with sides of stained glass, and a pattern resembling the lifts on top. The background of the stage travels through the Rising Falls, and around the castle, before returning to the Rising Falls.

When a fighter is on their final stock or low on health, or if the timer is at one minute, the stage transforms into the Dive to the Heart. The layout remains the same, but the large platform is now a generic Station, and the smaller platform now resembles part of the stained glass staircase. The background features a random Station of Sora, Riku, Roxas, Xion, Terra, Ventus, or Aqua.

Sora's, Riku's, Aqua's, and Terra's stations are from the Square Enix's Cafe's coaster design. Roxas's and Xion's stations are from the Memorial Stained Glass Clock event. Ventus's station is from Kingdom Hearts Birth by Sleep.

Spirits
s are a collectible in Super Smash Bros. Ultimate, which can be used as a type of power-up. Challenger Pack 11 comes with 13 Kingdom Hearts-based spirits.

Fighter spirits
s are based on playable characters, and cannot be used as a power-up. Fighter spirits have two images: one from their home series, and one from Super Smash Bros. Ultimate.

Primary spirits
s are equippable spirits with attack and defense stats, and a possible trait, which provide bonuses to the character it is equipped to. They each have a class, showing their power, one of four possible types, and up to three slots for support spirits. Only one primary spirit can be equipped at a time.

Support spirits
s are equippable spirits that provide bonuses to the character they are equipped to. Support spirits have a class, like primary spirits, and a cost, which is how many of a primary spirit's slots it takes to equip it.

Spirit Battles
s are battles with specific conditions that serve as the main way of obtaining spirits.

Music
Challenger Pack 11 comes with 9 music tracks that can be played on the Hollow Bastion stage, and any of the original stages.
 * "Night of Fate" (Kingdom Hearts HD 1.5 ReMIX version)
 * "Destiny's Force" (Kingdom Hearts HD 1.5 ReMIX version)
 * "Shrouding Dark Cloud" (Kingdom Hearts HD 1.5 ReMIX version)
 * "Hand in Hand" (Kingdom Hearts HD 1.5 ReMIX version)
 * "Blast Away! -Gummi Ship II-" (Kingdom Hearts HD 1.5 ReMIX version)
 * "" (Kingdom Hearts HD 1.5 ReMIX version)
 * "Scherzo Di Notte" (Kingdom Hearts HD 1.5 ReMIX version)
 * "Fragments of Sorrow" (Kingdom Hearts HD 2.5 ReMIX version)
 * "Destati" (Kingdom Hearts version)

"Dearly Beloved -Swing Version-" is an additional track that can be unlocked by having save data from Kingdom Hearts Melody of Memory present.

"Blast Away! -Gummi Ship II-" is used during the credits sequence for Sora's Classic Mode.

"Destati" is played when accessing the Kingdom Hearts Spirit Board.

A special arrangement of "Hand in Hand" is used as Sora's victory theme.

"Hikari -KINGDOM Orchestra Instrumental Version-" is heard during Sora's reveal trailer.

Trivia

 * Keeping in line with the Kingdom Hearts series's connections to the numbers thirteen and seven, Sora's inclusion in Super Smash Bros. Ultimate alludes to these numbers as well:
 * The Kingdom Hearts series added five fighter spirits, five primary spirits, and three support spirits, totaling to thirteen spirits.
 * Hollow Bastion features one of seven different Stations of Awakening in the background when transitioning to Dive to the Heart.