Kingdom Hearts: Chain of Memories/Reverse Rebirth

Riku's gameplay is different from Sora's. Advantages
 * Riku jump higher than Sora, so he can reach a ledge easier.
 * Soul Eater attack depend on the AP, so the damage is more even.
 * Riku's deck is closed for editing, so no more CP calculating.
 * Riku automatically keeps all the boss card he obtained in his deck.
 * Dark mode: After fighting Ansem the first time, Riku can have a "darkness counter" below his HP counter in battle. When taking damage or card break your opponent, the darkness counter rises. When it reaches 30, Riku changes costume to the Heartless version in the original Kingdom Heart, his speed, jump, attack, dodge all improved.

Dodge: Riku's dodge now covers half the screen, in addiction, he can now dodge up and down.

Jump: Press while in the air will result in a double jump, in which Riku zooms in on an enemy and land behind it.Useful in dodging attacks.

New Attacks

Spin attack: +Attack Card: Riku spin around with Soul Eater, damage all enemy around him and sending enemy upward. Press to spin again and juggle the enemy for up to three attack.

Falcon Strike: ++Attack Card: Riku double jumps, zooms in on an enemy, and strike it from the behind with Soul Eater.

Normal combos: +(+)

First attack: normal

Second attack: Riku immediately follow up with a quick attack that stuns the enemy.

Third attack: Riku jump up in the air and attack.

What's more, Riku can use sleights:
 * Dark Break
 * Dark Fiagra
 * Dark Aura( Shadow of Oblivion)

Disadvantages:
 * Riku has a closed deck. That means no changes. Zip. Ni. Nada. Means if you get a really sucky deck, too bad.
 * Riku only has the King for a friend.
 * Riku can only heal through The King and Oggie. The former is highly unreliable and the latter is one-time.