Winner's Proof

In Kingdom Hearts 2 Final Mix, there are mushroom heartless called the Mushroom XIII. If you can clear all 13 Mushrooms challenges, you'll receive this Keyblade as a reward. It unknown on this Keyblade ability or if it is good at physical or magic attacks.

Two Across

This a new Keyblade you'll get after defeating Roxas, which can only be done in Kingdom Hearts 2 Final Mix. It has a great attack power and a good magic power, and increases your chance of change into Final Form (If you don't have it yet) and Anti-Form.

The Dark Keyblade

A strange Keyblade that opens peoples hearts. It was used by Xehanort's Heartless who was disguised as Riku, it was never seen again after Sora used it to free Kairi's heart from inside himself.

Darkside (Mickey's Keyblade)

A Keyblade used by King Mickey. This Keyblade is very similar to Sora's Keyblade, only it has the reversed colors of the Kingdom Key.

Kairi's Keyblade

A Keyblade that is used by Kairi, it power is still unknown. The only thing it reveals is that Kairi is a Keyblade Master.

Fenrir

The strongest Keyblade in the game, it's even stronger than the Ultima Weapon. It can be claimed when you have done the following:
1. Defeat Sephiroth in a one on one battle (I think your teammates help you in proud mode).
2. After the battle with Sephiroth, tell Cloud his location.
3. Go tell Sephiroth that Cloud is on his way to fight him.
If you do all of the following, Tifa will give you this Keyblade. It has tremendous attack power, but isn't good at magic and lowers the number of hits in you combos. This Keyblade work well with the Ultima Weapon when your in Final Form.

Fatal Crest

Now this is weird, a Keyblade from Olympus Coliseum that is bad in attack power, but good in magic power. Now that's a first, since all the other Olympus Coliseum Keyblades were good in close combat.

Bond Of Flame

A Keyblade you'll get after Axel's dies helping you escape some Nobodies. It has good attack and magic power, and it gives your fire attacks like Firaga a power boost.

Sleeping Lion

A Keyblade thats given to you by Leon before you go to help Tron so he can help you save Hollow Bastion. It not good at magic power, gives your attack combos a little boost.

Mysterious Abyss

A Keyblade that is rewarded to you for defeating Ursala in Kingdom Hearts 2. It has good attack and magic power, and gives your ice attacks like Blizzaga a power boost.