Weapons

A Weapon is any object used to inflict damage by either physical or non-physical (i.e. elemental) means. In Kingdom Hearts: Chain of Memories, all characters and enemies wield Cards.

Sora
Sora is the first playable Keyblade wielder in the series (by release date). Sora's weapons are all variations of his normal Keyblade with a relative appearance as to where he earned that Keychain, or who he obtained it from. It is noted that his Keyblade abilities become more advanced as the series moves on.

Unversed

 * Buckle Bruiser- Dual Shields


 * Iron Prisoner II, III, IV- Fire Hammer


 * Mimic Master- Book


 * Symphony Master - Baton

Heartless

 * Defender - Defender (shield)
 * Wizard - Wizard's Relic
 * Bandit - Scimitar
 * Invisible - Notched broadsword
 * Kurt Zisa - Twin shotels
 * Ansem - Dual-Bladed Soul Eater
 * Bookmaster - Akashic Record
 * Shaman - Shaman's Relic
 * Runemaster - Akashic Record+
 * Necromancer - Spell's Relic+

Nobodies

 * Dragoon - Nobody Lance
 * Gambler - Cards and Dice
 * Samurai- Swords
 * Berserker - Hammer

Kingdom Hearts

 * Cards of Spades - Card's Axe
 * Cards of Hearts - Card's Lance
 * Clayton - Shotgun
 * Jafar - Magic Staff
 * Captain Hook - Pirate's Rapier
 * Maleficent - Witch's Staff
 * Giant Ursula - Trident
 * Jafar (Genie) - Magic

Kingdom Hearts II

 * Shan Yu - Barbar's Sword
 * Captain Barbossa - Pirate's Gun & Sword
 * Undead Pirate-A - Pirate's Axe
 * Undead Pirate-B - Pich
 * Undead Pirate-C - Pirate's Gun
 * Pete - Exploding balls

Party members

 * Tarzan - Spear
 * Aladdin - Scimitar
 * Peter Pan - Dagger
 * Ariel - Fist & Tail
 * Jack Skellington - Bone Fist
 * Beast - Claws

Final Fantasy characters

 * Tidus - Wooden Pole
 * Selphie - Jump Rope
 * Wakka - Blitzball
 * Leon - Gunblade
 * Yuffie - Shuriken
 * Cloud - Bandaged Buster Sword
 * Sephiroth - Masamune

Party Members

 * Captain Jack Sparrow - Skill and Crossbones
 * Auron - Battlefields of War (Also a Final Fantasy character)
 * Aladdin - Scimitar
 * Simba - Proud Fang
 * Tron - Identity Disk
 * Mulan - Sword of the Ancestor
 * Beast - Beast's Claws
 * Jack Skellington - Bone Fist

Final Fantasy characters

 * Vivi - Struggle Sword
 * Seifer - Struggle Sword
 * Setzer - Struggle Sword
 * Cloud - Bandaged Fusion Sword
 * Leon - Gunblade
 * Yuffie - Shuriken
 * Sephiroth- Masamune

Kingdom Hearts II

 * Genie - Genie's Keyblade
 * Stitch - Laser Guns / Ukulele
 * Peter Pan - Dagger
 * Chicken Little - Slingshot (during FPS mode only)

Other

 * King Triton - Trident
 * Hayner - Struggle Sword