Thunder

Thunder (サンダー), Thundara (サンダラ), and Thundaga (サンダガ) magic are attacks used by Sora, Donald, and other characters and enemies that utilize the element of Lightning.

Kingdom Hearts
In Kingdom Hearts, Thunder was a more powerful and costly spell than Fire or Blizzard, summoning a barrage of lightning bolts from above to strike an enemy and any other enemies nearby. It cost 1 MP bar to use.

Kingdom Hearts: Chain of Memories
In Kingdom Hearts: Chain of Memories, there is a Thunder Magic card that can be used in many different Sleights:


 * Thundara
 * Thundaga
 * Thunder Raid
 * Freeze (Re:CoM only)

Keyblades are given elemental properties in this game. Here are the attack cards with a Thunder-based property:


 * Spellbinder
 * Photon Debugger

Kingdom Hearts II
In Kingdom Hearts II, Thunder is more or less equal to the other attack spells, summoning a single lightning bolt to strike one enemy. The area of effect increases with Thundara and Thundaga.

There is a new ability in this game called Thunder Boost, which increases the amount of damage done by Thunder spells. It is also a passive ability from the Photon Debugger Keyblade.

It can be used by:


 * Donald
 * Jack Skellington
 * Tron

Kingdom Hearts 358/2 Days
In Kingdom Hearts 358/2 Days, Thunder sends out a straight line of lightning bolts in front of the caster. Thundara works like the Thunder spells in Kingdom Hearts where lightning strikes randomly around the caster for a period of time. Thundaga invokes a single, enormous bolt of lightning on top of the target.

Kingdom Hearts Birth by Sleep
Thunder magic will be usable again in Kingdom Hearts Birth by Sleep.

Kingdom Hearts
Thunder: Learned after completing Philoctetes barrel challenge. Power equals Max (MPx2)+14.

Thundara: Upgraded after defeating the giant Ursula. Power equals Max (MPx2)+18.

Thundaga: Upgraded after defeating Cerberus in the Hades Cup. Power equals Max (MPx2)+22.


 * Note: Though the Olympus Coliseum tournaments are not needed to go through the storyline, you cannot get Thundara before Thunder. When getting any Magic for the first time, the player receives the first level spell or an upgrade. Therefore, if one defeats Giant Ursula before completing Phil's challenge, they will receive Thunder, not Thundara.
 * Also, because Olympus Coliseum and Atlantica both can be skipped, Thunder is one of two spells that can be avoided entirely in-game, the other being Stop.

Kingdom Hearts: Chain of Memories
Thunder: A Magic Card obtained after defeating Larxene for the first time.

Thundara: Stock 2 Thunder Cards.

Thundaga: Stock 3 Thunder Cards.

Kingdom Hearts II
Thunder: Defeat the Hydra (Olympus Coliseum)

Thundara: Upgraded after the defeat of Storm Rider (Land of Dragons)

Thundaga: Upgraded after the defeat of Groundshaker (Pride Lands)

Enemies that use Thunder Magic

 * Yellow Opera
 * Devastator
 * Bookmaster
 * Wizard
 * Ursula
 * Storm Rider
 * Groundshaker
 * Larxene

Synthesis Materials

 * In Kingdom Hearts, the synthesis materials with the power of thunder were called Thunder materials.
 * In Kingdom Hearts II, the synthesis materials with the power of thunder were called Lightning materials.

Gummi Blocks

 * In Kingdom Hearts, the Thunder terms are used to mark the ranks of the Weapon Gummi Blocks.
 * In Kingdom Hearts II, Thunder are used to mark the ranks of the laser-like Lock-On Gummi Blocks.

Armor and Accessories
There are pieces of accessories in Kingdom Hearts and pieces of armor that have attributes that can increase defense against Thunder or increase damage done by Thunder.


 * Kingdom Hearts: Thunder Ring, Thundara Ring, Thundaga Ring, Element Ring, Three Stars, Holy Circlet, and Ribbon.
 * Kingdom Hearts Final Mix: Thundagun Wrist, Ramuh Belt and Royal Crown
 * Kingdom Hearts II: Abas Chain, Aegis Chain, Acrisius, Acrisius+, Cosmic Chain, Thunder Trinket, Thundara Trinket, Thundaga Trinket, Thundagun Trinket, Gaia Belt, Petit Ribbon and Ribbon.
 * Kingdom Hearts II Final Mix: Shock Charm and Highest Ribbon

Trivia

 * Although named Thunder, lightning and electricity are actually used, not thunder itself.
 * There is very little noticable change between thunder and its upgraded forms in Kingdom Hearts II
 * Thunder has decreased in power in Kingdom Hearts II, as opposed to Fire and Blizzard, which have increased in power from the first game.

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