Boss Music

Boss Music is used numerous times in the Kingdom Hearts series to indicate that the current battle is with a boss. Most Boss Music is fast-paced and sends a theme of evil or tension. Usually the same song would be used in different boss battles to show the connection between them, e.g. "Shrouding Dark Cloud" is mostly associated with Heartless Bosses and "Squirming Evil" is used commonly for Disney Bosses in Kingdom Hearts.

Kingdom Hearts

Arabian Dream

Arabian Dream

Arabian Dream, normally the battle theme in Agrabah, is also used in a single boss battle.

Heard while fighting

• Cave of Wonders Guardian in Agrabah

The Deep End

The Deep End

The Deep End is a boss theme that plays throughout the game, in rather intense battles.

Heard while fighting

• Rock Titan in Olympus Coliseum
• Ice Titan in Olympus Coliseum
• Kurt Zisa in Agrabah
• Giant Ursula in Atlantica
• Maleficent (Dragon) in Hollow Bastion
• Ansem, Seeker of Darkness (first battle) in End of the World

Destiny's Force

Destiny's Force

Destiny's Force, though commonly associated with fighting a Darkside, plays in a variety of occasions.

Heard while fighting

• Darkside in Destiny Islands, End of the World
• Opposite Armor in Traverse Town
• Jafar (Genie) in Agrabah
• Parasite Cage (second battle) in Monstro
• Oogie's Manor in Halloween Town
• Phantom in Neverland
• Behemoth in Hollow Bastion

Dive into the Heart -Destati-

Dive into the Heart -Destati-

Dive into the Heart -Destati-, a notable reorchestration of Destati, plays throughout Sora's Awakening, climaxing during the fight against a Darkside.

Heard while fighting

• Darkside in Awakening

Forze del Male

Forze del Male

Forze del Male is a boss them associated with Ansem, Seeker of Darkness, as it plays in two fights against him.

Heard while fighting

• Riku (second battle) in Hollow Bastion
• Ansem, Seeker of Darkness (second battle) in End of the World

Guardando nel buio

Guardando nel buio

Guardando nel buio, another notable reorchestration of Destati, plays while fighting the World of Chaos.

Heard while fighting

• World of Chaos in End of the World

Having a Wild Time

Having a Wild Time

Having a Wild Time, while normally the battle theme of Deep Jungle, also plays during two boss battles.

Heard while fighting

• Sabor in Deep Jungle
• Clayton in Deep Jungle

Night of Fate

Night of Fate

Night of Fate, also the battle theme of Destiny Islands and Traverse Town (in the first visit), plays while battling Leon.

Heard while fighting

• Leon in Traverse Town

A Night on the Bare Mountain

A Night on the Bare Mountain

A Night on Bare Mountain, originally composed by Modest Mussorgsky, is rearranged as a boss theme for Chernabog.

Heard while fighting

• Chernabog in End of the World

One-Winged Angel (from FINAL FANTASY VII)

One-Winged Angel (from FINAL FANTASY VII)

One-Winged Angel (from FINAL FANTASY VII), which originally played during the final battle against Safer Sephiroth, is rearranged for the fight against Sephiroth.

Heard while fighting

• Sephiroth in Olympus Coliseum

Scherzo di Notte

Scherzo di Notte

Scherzo di Notte, normally the battle theme of Hollow Bastion, plays during one boss battle as well.

Heard while fighting

• Riku (first battle) in Hollow Bastion

Shrouding Dark Cloud

Shrouding Dark Cloud

Shrouding Dark Cloud plays frequently, and is most commonly associated with Heartless battles.

Heard while fighting

• Guard Armor in Traverse Town
• Trickmaster in Wonderland
• Cloud (first battle) in Olympus Coliseum
• Pot Centipede in Agrabah
• Parasite Cage (first battle) in Monstro
• AntiSora in Neverland

Spooks of Halloween Town

Spooks of Halloween Town

Spooks of Halloween Town, normally the battle theme of Halloween Town, plays during a single boss battle as well.

Heard while fighting

• Lock, Shock, and Barrel in Halloween Town

Squirming Evil

Squirming Evil

Squirming Evil is commonly associated with bosses from the Disney mythos.

Heard while fighting

• {{ns|Game|Cerberus]] (first battle) in Olympus Coliseum
• Hades in Olympus Coliseum
• Clayton (second battle) in Deep Jungle
• Jafar in Agrabah
• Ursula in Atlantica
• Oogie Boogie in Halloween Town
• Captain Hook in Neverland
• Maleficent in Hollow Bastion
• Chernabog in End of the World

To Our Surprise

To Our Surprise

To Our Surprise, besides being Wonderland's battle theme, plays during a single boss battle.

Heard while fighting

• Queen of Hearts, Card Soldiers, and Crank Tower in Wonderland

Kingdom Hearts Final Mix

Disappeared

Disappeared

Disappeared is a haunting boss theme that plays during the battle against an unknown opponent.

Heard while fighting

• Unknown in Hollow Bastion

Kingdom Hearts: Chain of Memories

Face It!

Face It!

Face It!, comprising primarily of cellos, an organ, and a timpani, plays during a select few boss battles.

Heard while fighting

• Cloud in Olympus Coliseum
• Ursula in Atlantica (Reverse/Rebirth)

The Fight for My Friends

The Fight for My Friends
File:The Fight for My Friends KHRECOM.ogg

The Fight for My Friends plays frequently throughout the game during multiple boss encounters.

Heard while fighting

• Hades in Olympus Coliseum
• Jafar (Genie) in Agrabah
• Oogie Boogie in Halloween Town
• Ursula in Atlantica (Sora's Story)
• Captain Hook in Neverland
• Maleficent (Dragon) in Hollow Bastion

The Force in You

The Force in You

The Force in You is a boss theme associated with the Riku Replica, as it only plays during battles against him.

Heard while fighting

• Riku Replica in Castle Oblivion, Twilight Town

Graceful Assassin

Graceful Assassin

Graceful Assassin, also Marluxia's title in Organization XIII, plays while Sora fights his illusion in the first of two battles against him.

Heard while fighting

• Fake Marluxia in Castle Oblivion

Revenge of Chaos

Revenge of Chaos

Revenge of Chaos, a brass-heavy song, plays during the final boss of Reverse/Rebirth against Ansem, Seeker of Darkness.

Heard while fighting

• Ansem, Seeker of Darkness in Castle Oblivion

Scythe of Petals

Scythe of Petals

Scythe of Petals, referring to Marluxia's weapon, plays during the final battle against him.

Heard while fighting

• Marluxia (Second Form) in Castle Oblivion

Struggle Away

Struggle Away

Struggle Away, a recurring boss theme, plays in various battles in the recreated worlds Sora and Riku visit.

Heard while fighting

• Guard Armor in Traverse Town
• Trickmaster in Wonderland
• Parasite Cage in Monstro
• Darkside in Destiny Islands

To Our Surprise

To Our Surprise

To Our Surprise, besides being Wonderland's battle theme, plays during a single boss battle.

Heard while fighting

• Card Soldiers in Wonderland

The 13th Struggle

The 13th Struggle

The 13th Struggle is the boss theme associated with members of Organization XIII, playing solely during fights against them.

Heard while fighting

• Axel in Castle Oblivion
• Larxene in Castle Oblivion
• Vexen in Castle Oblivion, Twilight Town
• Larxene in Castle Oblivion
• Lexaeus in Castle Oblivion

Kingdom Hearts Re:Chain of Memories

Go for It!

Go for It!

Go for It!, besides being Olympus Coliseum's battle theme, plays during a single boss battle.

Heard while fighting

• Cloud in Olympus Coliseum

Lord of the Castle

Lord of the Castle

Lord of the Castle, a bold orchestral theme featuring a bold piano arpeggio, plays as the new final boss theme.

Heard while fighting

• Marluxia (Third Form) in Castle Oblivion

The 13th Struggle

The 13th Struggle

The 13th Struggle is the boss theme associated with members of Organization XIII, playing solely during fights against them.

Heard while fighting

• Zexion in Destiny Islands

Kingdom Hearts II

The Corrupted

The Corrupted

The Corrupted plays during a multitude of battles in Sora's second journeys to each world.

Heard while fighting

• Storm Rider in Land of Dragons
• {{ns|Game|Grim Reaper]] (second battle) in Port Royal
• The Experiment in Halloween Town
• Groundshaker in The Pride Lands
• Hostile Program in Space Paranoids

Dance to the Death

Dance to the Death

Dance to the Death plays during a select few bosses during the game.

Heard while fighting

• {{ns|Game|Possessor]]/[[Thresholder}} in Beast's Castle
• Shadow Stalker in Beast's Castle
• {{ns|Game|Prison Keeper]] and [[Lock, Shock, and Barrel|Lock, Shock and Barrel}} in Halloween Town

Darkness of the Unknown

Darkness of the Unknown

Darkness of the Unknown is comprised of three movements, each played during a different phase of the final boss battle.

Heard while fighting

• {{ns|Game|Xemnas|Xemnas (Dragon)]] (second battle) in The World That Never Was
• Xemnas (Final) in The World That Never Was

Desire for All That Is Lost

Desire for All That Is Lost

Desire for All That Is Lost is a forlorn theme that places strong emphasis on a piano.

Heard while fighting

• Dark Thorn in Beast's Castle
• Hydra in Olympus Coliseum
• {{ns|Game|Pete]] (3rd Battle) in Timeless River
• {{ns|Game|Volcanic Lord]] and [[Blizzard Lord}} in Agrabah

Disappeared

Disappeared

Disappeared, a haunting battle theme, plays once again during a battle against Xemnas.

Heard while fighting

• Xemnas in The World That Never Was

The Encounter

The Encounter

The Encounter is the theme most commonly associated with battles with Disney villains and enemies.

Heard while fighting

• Hades in Olympus Coliseum
• Jafar in Agrabah
• Oogie Boogie in Halloween Town
• Scar in The Pride Lands
• {{ns|Game|Sark]] and the [[MCP}} in Space Paranoids

A Fight to the Death

A Fight to the Death

A Fight to the Death plays during the battle against Xemnas in his Kingdom Hearts.

Heard while fighting

• Xemnas (Dragon) in Fight to the Death
• {{ns|Game|Xemnas|Xemnas (Armor)]] (first battle) in A Fight to the Death

One-Winged Angel

One-Winged Angel
File:One-Winged Angel KHII.ogg

One-Winged Angel is a theme from Final Fantasy VII. It is used for Sephiroth's boss fight.

Heard while fighting

• Sephiroth in Radiant Garden

Rowdy Rumble

Rowdy Rumble

Rowdy Rumble, a fast-paced song, plays during a number of fast-paced boss battles.

Heard while fighting

• {{ns|Game|Pete]] (first battle) in Olympus Coliseum
• Pete? in Timeless River
• {{ns|Game|Pete]] (second battle) in Timeless River
• Lock, Shock and Barrel in Halloween Town
• Shenzi, Banzai, and Ed in The Pride Lands

Sinister Shadows

Sinister Shadows

Sinister Shadows, though most prominently played in the Battle of the 1000 Heartless, is also featured in certain boss battles.

Heard while fighting

• {{ns|Game|Grim Reaper]] (first battle) in Port Royal
• Sark in Space Paranoids

Tension Rising

Tension Rising

Tension Rising is the theme normally used for battles with Heartless and Nobodies.

Heard while fighting

• Twilight Thorn in Awakening
• The Beast in Beast's Castle
• {{ns|Game|Demyx]] (first battle) in Underworld

Vim and Vigor

Vim and Vigor

Vim and Vigor is a melancholy song that plays in a variety of battles.

Heard while fighting

• Shan Yu in The Land of Dragons
• Cerberus in Olympus Coliseum
• {{ns|Game|Captain Barbossa]] and [[Illuminator}} in Port Royal

The 13th Dilemma

The 13th Dilemma

The 13th Dilemma is a theme also used for battles with the Organization.

Heard while fighting

• {{ns|Game|Demyx|Demyx]] (second battle) in Hollow Bastion
• Xaldin in Beast's Castle
• Xigbar in The World That Never Was
• Saïx in The World That Never Was

The 13th Struggle

The 13th Struggle

The 13th Struggle is a theme associated with Organization XIII; in this game especially it is often associated with Axel, due to it being played in both his boss battles.

Heard while fighting

• Axel in Simulated Twilight Town
• Luxord in The World That Never Was

Kingdom Hearts II Final Mix

Darkness of the Unknown

Darkness of the Unknown

Darkness of the Unknown is comprised of three movements, the last of which plays during the battle against the data replica of Xemnas.

Heard while fighting

• Xemnas's Replica Data in Cavern of Remembrance

Disappeared

Disappeared

Disappeared, a haunting battle theme, plays once again during a battle against Xemnas.

Heard while fighting

• Xemnas Data's Replica Data in Cavern of Remembrance

The Other Promise

The Other Promise
File:The Other Promise KHII.ogg

The Other Promise is a rearrangement of Roxas, playing during his fight with Sora.

Heard while fighting

• Roxas in The World That Never Was
• Roxas's Replica Data in Cavern of Remembrance

Rage Awakened

Rage Awakened
File:Rage Awakened KHII.ogg

Rage Awakened is a bold theme, featuring a violin as its most prominent instrument.

Heard while fighting

• Lingering Will in Keyblade Graveyard

The 13th Dilemma

The 13th Dilemma

The 13th Dilemma is a theme also used for battles with the Organization.

Heard while fighting

• Demyx's Replica Data in Cavern of Remembrance
• Saïx's Replica Data in Cavern of Remembrance
• Xaldin's Replica Data in Cavern of Remembrance
• Xigbar's Replica Data in Cavern of Remembrance

The 13th Reflection

The 13th Reflection

The 13th Reflection is an eerily calm theme used for battles against the Organization members that were felled in Castle Oblivion.

Heard while fighting

• {{ns|Game|Vexen's Absent Silhouette]] and Clone Sora in Agrabah
• Lexaeus's Absent Silhouette in Twilight Town
• Zexion's Absent Silhouette in Olympus Coliseum
• Marluxia's Absent Silhouette in Beast's Castle
• Larxene's Absent Silhouette in Port Royal
• Larxene's Replica Data in Cavern of Remembrance
• Marluxia's Replica Data in Cavern of Remembrance
• Zexion's Replica Data in Cavern of Remembrance
• Lexaeus's Replica Data in Cavern of Remembrance
• {{ns|Game|Vexen's Replica Data]] and [[Anti Form}} in Cavern of Remembrance

The 13th Struggle

The 13th Struggle

The 13th Struggle is a theme associated with Organization XIII, prominently featuring an organ and a large brass section.

Heard while fighting

• Axel's Replica Data in Cavern of Remembrance
• Luxord's Replica Data in Cavern of Remembrance