What you get in Key of Rewards, Treasure, and secret cards

Inside Key of Reward:
Traverse Town: Saix and Lion Heart
Agrabah: Luxord and Warp
Olympus Coliseum: Metal Chocobo, Monochrome
Monstro: Aqua Splash, Xaldin
Halloween Town:Bind, Bond of Flame
Atlantica: Demyx, Quake
Neverland: Thunder Raid, Follow the Wind
Hollow Bastion: Mushu, Xigbar
Twilight Town: Stardust Breeze, Roxas
Destiny Island: MegaElixir, Photon Debugger
Castle Oblivion: Super Glide, Star Seeker
Wonderland: Xemnas and Synchro

Treasure Reward:
Traverse Town: Hidden Dragon
Agrabah: Gravity
Olympus Coliseum: Blizzard Raid
Wonderland : Stop
Monstro: Fire Raid
Halloween Town: Miracle Gift
Atlantica: Shock Impact, Homing Blizzard
Neverland: Teleport
Hollow Bastion: Reflect Raid
Twilight Town: Detonator
Destiny Island: Judgement
Castle Oblivion: Raging Storm

Secret Cards:
Any World: Diamond Dust in Calm Bounty(Beat Marluxia(I))
Twilight Town: One-Winged Angel in Calm Bounty(Beat Marluxia(I))
Any world: Ultima Weapon in Calm Bounty(Clear R/R)
Any World: Lexaeus in Calm Bounty(Clear R/R)
Twilight Town: Ansem in Calm Bounty(Clear R/R)
Any World: Gold Card in Calm Bounty(Get 100% Card Collection)
Any World: Platinum Card in Calm Bounty(Get 100% Card Collection)
Destiny Island: Zexion in Calm Bounty(Clear R/R)

If you have something to ask, post in here

 

You mean you don't know?
if you get Key of Reward and use it to open Door to Reward to any world, you'll get the cards i told

 

You'll get Organization XIII enemy cards that haven't make appearance in KH: Re CoM
If you beat Riku story and playing as Sora again.

Too bad you didn't have them. I already got all of Organization XIII cards. Luxord is very best enemy cards!!!

 

I get this from a source. I have try it and got most of them in Key of Reward. the effects are:
Organization XIII cards
Saïx: Give more damage in every combo you give (combo boost)
Luxord: (my favorite ^^) Break enemy's card/sleight no matter how many number you/enemy give (Omni Break)
Xemnas: (confused =S) sort like if the enemy attack with combo, the second attack will be blocked. (Quick Barrier)
Xaldin: Create a aero aura which like Aero in KH (Aero Guard)
Demyx: (my favorite too ^^) Much more like Blue Rhapsody card, but more damage (Water Charge)
Xigbar: Give more damage to "Raid" attack. (Missile Shot)
Lexeaus: Kill enemy in instant in a percentage (Warp Break)
Zexion: Confuse enemy with every strike (Confuse-Strike)
Marluxia: Use the same sleight twice (Double-Sleight)
Vexen: Revive automaticly when you died (Auto-Life)
Larxene: Increase running speed (Dash)
Axel: Use cards even while staggering from damage (Quick Recovery)

Ansem: Hide your sleight from the enemy (Sleightbind)


Sleight:
Warp: Kill all enemies in sight within instant, not always success and you don't get EXP.
Synchro: Set surrounding enemies' HP to that of the target.
Aqua Splash: Much more like Dumbo's Splash
Quake: Inflict damage on all ground enemies with a violent tremor
Thunder Raid: Another Raid but with Thunder element
Bind: Hold the enemy on place, but they still could attack
Stardust Breeze: Donald will throw fireball to you and spread it into enemy