Kingdom Hearts (series)/Trivia

This is a collection of major pieces of  trivia that span numerous entries.

Seven and thirteen
The numbers seven and thirteen frequently reoccur throughout the Kingdom Hearts series. Seven is closely associated with light, while thirteen is associated with darkness.

Overarching

 * There are seven pure lights, the Princesses of Heart or New Seven Hearts.
 * There are seven protectors of light, the Seven Guardians of Light.
 * There are thirteen pure darknesses, the ancient entities known as.
 * The χ-blade shattered into seven pieces of light and thirteen pieces of darkness.
 * There are seven Lost Masters, The Master of Masters and his six apprentices.
 * There are thirteen main members of Organization XIII and the real Organization XIII.

Kingdom Hearts

 * The Keyhole in Neverland is located at the thirteen minute mark on Big Ben's clock face.
 * Sora can learn seven types of magic spells.
 * The Ars Arcanum attack consists of thirteen strikes.

Kingdom Hearts Chain of Memories

 * There are thirteen floors in Castle Oblivion.
 * The Room of Beginnings in Castle Oblivion requires cards with the values 1 and 3.
 * The final Unknown Room in Castle Oblivion requires cards with a cumulative value of at least 13.

Kingdom Hearts II

 * Roxas spends seven days in the Simulated Twilight Town.
 * Roxas lands seven hits on DiZ's computer.
 * It takes thirteen hits to defeat Seifer in the first match.
 * Riku's Eternal Session Limit includes an ability named "XIII Blades".
 * Synthesizing the Ultima Weapon requires thirteen Orichalcum+.
 * There are a total of seven Orichalcum+ in the game, exactly the number needed after using an Energy Crystal.
 * The Fenrir Keblade has a strength increase of seven, the highest in the game.

Kingdom Hearts II Final Mix

 * Using the Restore Count Reaction Command against     restores the hit counter by thirteen points.
 * There are thirteen members of Mushroom XIII.
 * The Centurion staff has a strength increase of thirteen, the highest in the game.
 * The Winner's Proof Keyblade has a magic increase of seven, the highest in the game.

Kingdom Hearts Re:coded

 * There are a total of thirteen System Sectors.
 * The final System Sector has thirteen floors.
 * There are seven music tracks introduced in this game.

Kingdom Hearts 358/2 Days

 * The game begins on Day 7.
 * Roxas's first real mission with the Organization is Mission 7.
 * Luxord can wield a deck of Cards named Finest Fantasy 13.
 * There are thirteen music tracks introduced in this game.

Kingdom Hearts Birth by Sleep

 * There are thirteen matches in the Mirage Arena.
 * Vanitas is fought seven times across all three campaigns.

Kingdom Hearts Birth by Sleep Final Mix

 * The sum of the time on the Keyblade, 8:05, is equal to thirteen.
 * Once the Unknown fight is unlocked, the Land of Departure has a combat level of thirteen.

Kingdom Hearts 3D: Dream Drop Distance

 * Sora is "Combatant thirteen" when he faces Rinzler in The Grid.
 * As with the No Name, the sum of the time on Young Xehanort's Keyblade is equal to thirteen.
 * There are thirteen types of Training Toy candies.

Kingdom Hearts III

 * There are seven members of the Flantastic Seven.
 * There are a total of seven Orichalculm+, all of which are required to synthesize the Ultima Weapon.
 * The Ultima Weapon has a strength and magic increase of thirteen, the highest in the game.
 * The box art, Gathering, shows thirteen main characters.
 * The clock tower in Gathering displays thirteen hours on the clock.

Kingdom Hearts III Re Mind

 * The Breakthrough accessory has a strength increase of seven, the highest in the game.
 * There are seven lights on the chandelier in the Garden of Assemblage.

Kingdom Hearts Dark Road

 * There are seven pupils in Xehanort's class.
 * There are seven upperclassmen who went missing.
 * Xehanort tells Eraqus that it would take thirteen lifetimes to rebuild the world.

Other

 * There are thirteen musical tracks whose titles contain the number thirteen.
 * There are thirteen letters in:
 * "Kingdom Hearts"
 * "Light" and "Darkness"
 * "End of the World"
 * "Hollow Bastion"
 * "Radiant Garden"
 * "Sora", "Riku", and "Kairi"
 * "Sora", "Roxas", and "Xion"
 * "Roxas", "Axel", and "Xion"
 * "Terra-Xehanort"
 * "Ventus-Vanitas"
 * The Director's Secret Report XIII is a thirteen-part exposé by Tetsuya Nomura.
 * As of the 10th anniversary of the series, there were seven main games.
 * As of the 20th anniversary of the series, there were thirteen main games.

Kingdom Hearts Magical Puzzle Clash

 * The orange token is unlocked upon reaching level seven.
 * The purple token is unlocked upon reaching level thirteen.

Kingdom Hearts Trading Card Game

 * A player wins the game if the value of their World Cards totals thirteen.